A SQL database engine written in JavaScript diff --git a/cli.js b/cli.js new file mode 100644 index 000000000..1594a0030 --- /dev/null +++ b/cli.js @@ -0,0 +1,33 @@ +#!/usr/bin/env node + + +const readline = require('readline'); +const { executeSELECTQuery, executeINSERTQuery, executeDELETEQuery } = require('./queryExecutor'); + +const rl = readline.createInterface({ + input: process.stdin, + output: process.stdout +}); + +rl.setPrompt('SQL> '); +console.log('SQL Query Engine CLI. Enter your SQL commands, or type "exit" to quit.'); + +rl.prompt(); + +rl.on('line', async (line) => { + if (line.toLowerCase() === 'exit') { + rl.close(); + return; + } + + try { + // Execute the query - do your own implementation + }catch (error) { + console.error('Error:', error.message); + } + + rl.prompt(); +}).on('close', () => { + console.log('Exiting SQL CLI'); + process.exit(0); +}); \ No newline at end of file diff --git a/tests/step-20/cli.js b/cli.test.js similarity index 74% rename from tests/step-20/cli.js rename to cli.test.js index fbba6c02c..5d222e6c5 100644 --- a/tests/step-20/cli.js +++ b/cli.test.js @@ -20,24 +20,21 @@ test('DISTINCT with Multiple Columns via CLI', (done) => { match[1] = match[1].replace(/'/g, '"').replace(/(\w+):/g, '"$1":'); if (match && match[1]) { - console.log(match[1]); - console.log(typeof match[1]) // Parse the captured JSON string - // const results = JSON.parse(match[1]); + const results = JSON.parse(match[1]); // Validation logic - expect(JSON.parse(match[1])).toEqual //("[ { \"student_id\": \"1\", \"course\": \"Mathematics\" }, { \"student_id\": \"1\", \"course\": \"Physics\" }, { \"student_id\": \"2\", \"course\": \"Chemistry\" }, { \"student_id\": \"3\", \"course\": \"Mathematics\" }, { \"student_id\": \"5\", \"course\": \"Biology\" } ]") - ([ + expect(results).toEqual([ { student_id: '1', course: 'Mathematics' }, { student_id: '1', course: 'Physics' }, { student_id: '2', course: 'Chemistry' }, { student_id: '3', course: 'Mathematics' }, { student_id: '5', course: 'Biology' }, + { student_id: '5', course: 'Physics' } ]); console.log("Test passed successfully"); } else { - done() - throw new Error('Failed to parse CLI output'); + throw new Error('Failed to parse CLI output'); } done(); diff --git a/enrollment.csv b/enrollment.csv new file mode 100644 index 000000000..e80af8d93 --- /dev/null +++ b/enrollment.csv @@ -0,0 +1,6 @@ +student_id,course +1,Mathematics +1,Physics +2,Chemistry +3,Mathematics +5,Biology \ No newline at end of file diff --git a/src/csvReader.js b/src/csvReader.js index e69de29bb..bf85aa1da 100644 --- a/src/csvReader.js +++ b/src/csvReader.js @@ -0,0 +1,36 @@ +// src/csvReader.js + +const fs = require('fs'); +const parse = require('json2csv'); +const csv = require('csv-parser'); + +function readCSV(filePath) { + const results = []; + + return new Promise((resolve, reject) => { + fs.createReadStream(filePath) + .pipe(csv()) + .on('data', (data) => results.push(data)) + .on('end', () => { + resolve(results); + }) + .on('error', (error) => { + reject(error); + }); + }); +} + +async function writeCSV(filename, data) { + // Convert JSON data to CSV format + const csv = parse(data); + // Write CSV data to the file + try { + fs.writeFileSync(filename, csv); + console.log(`Data successfully written to ${filename}`); + } catch (error) { + console.error(`Error writing CSV to ${filename}:`, error); + } +} + +module.exports = {readCSV,writeCSV}; +// module.exports = writeCSV; \ No newline at end of file diff --git a/src/index.js b/src/index.js new file mode 100644 index 000000000..dfab77585 --- /dev/null +++ b/src/index.js @@ -0,0 +1,8 @@ +// src/index.js + +const { executeSELECTQuery, executeINSERTQuery, executeDELETEQuery } = require('./queryExecutor'); +const {parseSelectQuery, parseINSERTQuery, parseDeleteQuery} = require('./queryParser'); +const { readCSV, writeCSV } = require('./csvReader'); + + +module.exports = {readCSV, writeCSV ,parseDeleteQuery, parseSelectQuery, parseINSERTQuery, executeSELECTQuery, executeINSERTQuery, executeDELETEQuery }; \ No newline at end of file diff --git a/src/queryExecutor.js b/src/queryExecutor.js new file mode 100644 index 000000000..8b8205a92 --- /dev/null +++ b/src/queryExecutor.js @@ -0,0 +1,349 @@ +// src/index.js + + +const {parseSelectQuery, parseINSERTQuery, parseDeleteQuery} = require('./queryParser'); +const { readCSV, writeCSV } = require('./csvReader'); + +// Helper functions for different JOIN types +function performInnerJoin(data, joinData, joinCondition, fields, table) { + return data.flatMap(mainRow => { + const matchedJoinRows = joinData.filter(joinRow => { + const mainValue = mainRow[joinCondition.left.split('.')[1]]; + const joinValue = joinRow[joinCondition.right.split('.')[1]]; + return mainValue === joinValue; + }); + + // If there are matching rows, create a row for each match + return matchedJoinRows.map(joinRow => { + return fields.reduce((acc, field) => { + const [tableName, fieldName] = field.split('.'); + acc[field] = tableName === table ? mainRow[fieldName] : joinRow[fieldName]; + return acc; + }, {}); + }); + }); +} + +function performLeftJoin(data, joinData, joinCondition, fields, table) { + const leftJoinedData = data.flatMap(mainRow => { + const matchedJoinRows = joinData.filter(joinRow => { + const mainValue = mainRow[joinCondition.left.split('.')[1]]; + const joinValue = joinRow[joinCondition.right.split('.')[1]]; + return mainValue === joinValue; + }); + + if (matchedJoinRows.length === 0) { + return [createResultRow(mainRow, null, fields, table, true)]; + } + return matchedJoinRows.map(joinRow => createResultRow(mainRow, joinRow, fields, table, true)); + + }); + return leftJoinedData; +} + +function createResultRow(mainRow, joinRow, fields, table, includeAllMainFields) { + const resultRow = {}; + if (includeAllMainFields) { + // Include all fields from the main table + Object.keys(mainRow || {}).forEach(key => { + const prefixedKey = `${table}.${key}`; + resultRow[prefixedKey] = mainRow ? mainRow[key] : null; + }); + } + // Now, add or overwrite with the fields specified in the query + fields.forEach(field => { + const [tableName, fieldName] = field.includes('.') ? field.split('.') : [table, field]; + resultRow[field] = tableName === table && mainRow ? mainRow[fieldName] : joinRow ? joinRow[fieldName] : null; + }); + return resultRow; +} + +function performRightJoin(data, joinData, joinCondition, fields, table) { + // Cache the structure of a main table row (keys only) + + const RowStructure = data.length > 0 ? Object.keys(data[0]).reduce((acc, key) => { + acc[key] = null; // Set all values to null initially + return acc; + }, {}) : {}; + let rightJoinedData = joinData.map(joinRow => { + const mainRowMatch = data.find(mainRow => { + const mainValue = getValueFromGivenRow(mainRow, joinCondition.left); + const joinValue = getValueFromGivenRow(joinRow, joinCondition.right); + return mainValue === joinValue; + }); + // Use the cached structure if no match is found + const mainRowToUse = mainRowMatch || RowStructure; + // Include all necessary fields from the 'student' table + return createResultRow(mainRowToUse, joinRow, fields, table, true); + }); + return rightJoinedData +} + +function getValueFromGivenRow(row, compoundFieldName) { + const [tableName, fieldName] = compoundFieldName.split('.'); + return row[`${tableName}.${fieldName}`] || row[fieldName]; +} + +function applyGroupBy(data, groupByFields, aggregateFunctions) { + const groupResult = {}; + data.forEach(row => { + // Generate a key for the group + const Key = groupByFields.map(field => row[field]).join('-'); + // Initialize group in results if it doesn't exist + if (!groupResult[Key]) { + groupResult[Key] = { count: 0, sums: {}, mins: {}, maxes: {} }; + groupByFields.forEach(field => groupResult[Key][field] = row[field]); + } + // Aggregate calculations + groupResult[Key].count += 1; + aggregateFunctions.forEach(func => { + const match = /(\w+)\((\w+)\)/.exec(func); + if (match) { + const [, aggregateFunc, aggregateField] = match; + const value = parseFloat(row[aggregateField]); + switch (aggregateFunc.toUpperCase()) { + case 'SUM': + groupResult[Key].sums[aggregateField] = (groupResult[Key].sums[aggregateField] || 0) + value; + break; + case 'MIN': + groupResult[Key].mins[aggregateField] = Math.min(groupResult[Key].mins[aggregateField] || value, value); + break; + case 'MAX': + groupResult[Key].maxes[aggregateField] = Math.max(groupResult[Key].maxes[aggregateField] || value, value); + break; + // Additional aggregate functions can be added here + } + } + }); + }); + // Convert grouped results into an array format + return Object.values(groupResult).map(group => { + // Construct the final grouped object based on required fields + const finalGroup = {}; + groupByFields.forEach(field => finalGroup[field] = group[field]); + aggregateFunctions.forEach(func => { + const match = /(\w+)\((\*|\w+)\)/.exec(func); + if (match) { + const [, aggregateFunc, aggregateField] = match; + switch (aggregateFunc.toUpperCase()) { + case 'SUM': + finalGroup[func] = group.sums[aggregateField]; + break; + case 'MIN': + finalGroup[func] = group.mins[aggregateField]; + break; + case 'MAX': + finalGroup[func] = group.maxes[aggregateField]; + break; + case 'COUNT': + finalGroup[func] = group.count; + break; + // Additional aggregate functions can be handled here + } + } + }); + return finalGroup; + }); +} + +async function executeSELECTQuery(query) { + try{ + const { fields, table, whereClauses,joinType, joinTable, joinCondition,groupByFields,hasAggregateWithoutGroupBy,orderByFields,limit,isDistinct } = parseSelectQuery(query); + + let data = await readCSV(`${table}.csv`); + // LOGIC for applying the joins + if (joinTable && joinCondition) { + const joinData = await readCSV(`${joinTable}.csv`); + switch (joinType.toUpperCase()) { + case 'INNER': + data = performInnerJoin(data, joinData, joinCondition, fields, table); + break; + case 'LEFT': + data = performLeftJoin(data, joinData, joinCondition, fields, table); + break; + case 'RIGHT': + data = performRightJoin(data, joinData, joinCondition, fields, table); + break; + default: + throw new Error(`Unsupported join type`); + // Handle default case or unsupported JOIN types + } + } + + let filteredData = whereClauses.length > 0 + ? data.filter(row => whereClauses.every(clause => evaluateCondition(row, clause))) + : data; + + let groupData = filteredData; + if(hasAggregateWithoutGroupBy){ + // handling queries where there are no Group by and we are doing Aggregrate + const output = {}; + + fields.forEach(field => { + const match = /(\w+)\((\*|\w+)\)/.exec(field); + if (match) { + const [, aggregrateFunc, aggregrateField] = match; + switch (aggregrateFunc.toUpperCase()) { + case 'COUNT': + output[field] = filteredData.length; + break; + case 'SUM': + output[field] = filteredData.reduce((acc, row) => acc + parseFloat(row[aggregrateField]), 0); + break; + case 'AVG': + output[field] = filteredData.reduce((acc, row) => acc + parseFloat(row[aggregrateField]), 0) / filteredData.length; + break; + case 'MIN': + output[field] = Math.min(...filteredData.map(row => parseFloat(row[aggregrateField]))); + break; + case 'MAX': + output[field] = Math.max(...filteredData.map(row => parseFloat(row[aggregrateField]))); + break; + // Additional aggregate functions can be handled here + } + } + }); + + return [output]; + }else if(groupByFields){ + groupData = applyGroupBy(filteredData,groupByFields,fields) + + let orderOutput = groupData; + if(orderByFields){ + orderOutput=groupData.sort((a, b) => { + for (let { fieldName, order } of orderByFields) { + if (a[fieldName] < b[fieldName]) return order === 'ASC' ? -1 : 1; + if (a[fieldName] > b[fieldName]) return order === 'ASC' ? 1 : -1; + } + return 0; + }); + } + if (limit !== null) { + orderOutput = orderOutput.slice(0, limit); + } + if (isDistinct) { + groupData = [...new Map(groupData.map(item => [fields.map(field => item[field]).join('|'), item])).values()]; + } + return groupData; + + + } else{ + + // Order them by the specified fields + let orderOutput = groupData; + if (orderByFields) { + orderOutput = groupData.sort((a, b) => { + for (let { fieldName, order } of orderByFields) { + if (a[fieldName] < b[fieldName]) return order === 'ASC' ? -1 : 1; + if (a[fieldName] > b[fieldName]) return order === 'ASC' ? 1 : -1; + } + return 0; + }); + } + if (limit !== null) { + orderOutput = orderOutput.slice(0, limit); + } + if (isDistinct) { + orderOutput = [...new Map(orderOutput.map(item => [fields.map(field => item[field]).join('|'), item])).values()]; + } + return orderOutput.map(row => { + const selectedRow = {}; + fields.forEach(field => { + selectedRow[field]=row[field]; + }); + + return selectedRow; + }); + } +} +catch(error){ + throw new Error(`Error executing query: ${error.message}`); +} +} + +function evaluateCondition(row, clause) { + let { field, operator, value } = clause; + + if (row[field] === undefined) { + throw new Error(`Invalid field`); + } + // Parse row value and condition value based on their actual types + const rowValue = parsingValue(row[field]); + let conditionValue = parsingValue(value); + if (operator === 'LIKE') { + // Transform SQL LIKE pattern to JavaScript RegExp pattern + const regexPattern = '^' + value.replace(/%/g, '.*').replace(/_/g, '.') + '$'; + const regex = new RegExp(regexPattern, 'i'); // 'i' for case-insensitive matching + return regex.test(row[field]); + } + // Compare the field value with the condition value + switch (operator) { + case '=': return rowValue === conditionValue; + case '!=': return rowValue !== conditionValue; + case '>': return rowValue > conditionValue; + case '<': return rowValue < conditionValue; + case '>=': return rowValue >= conditionValue; + case '<=': return rowValue <= conditionValue; + default: throw new Error(`Unsupported operator: ${operator}`); + } +} + +function parsingValue(value) { + // Return null or undefined as is + if (value === null || value === undefined) { + return value; + } + // If the value is a string enclosed in single or double quotes, remove them + if (typeof value === 'string' && ((value.startsWith("'") && value.endsWith("'")) || (value.startsWith('"') && value.endsWith('"')))) { + value = value.substring(1, value.length - 1); + } + // Check if value is a number + if (!isNaN(value) && value.trim() !== '') { + return Number(value); + } + // Assume value is a string if not a number + return value; +} + +async function executeINSERTQuery(query) { + const { table, columns, values } = parseINSERTQuery(query); + const data = await readCSV(`${table}.csv`); + + // Creating a fresh row + const FRow = {}; + columns.forEach((column, index) => { + let value = values[index]; + if (value.startsWith("'") && value.endsWith("'")) { + value = value.substring(1, value.length - 1); + } + FRow[column] = value; + }); + + data.push(FRow); + + await writeCSV(`${table}.csv`, data); + return { message: "Row inserted successfully." }; +} + + +// src/queryExecutor.js + +async function executeDELETEQuery(query) { + const { table, whereClauses } = parseDeleteQuery(query); + let data = await readCSV(`${table}.csv`); + + if (whereClauses.length > 0) { + // Filter out the rows that meet the where clause conditions + // Implement this. + } else { + // If no where clause, clear the entire table + data = []; + } + + // Save the updated data back to the CSV file + await writeCSV(`${table}.csv`, data); + + return { message: "Rows deleted successfully." }; +} + +module.exports = { executeSELECTQuery, executeINSERTQuery, executeDELETEQuery }; \ No newline at end of file diff --git a/src/queryParser.js b/src/queryParser.js new file mode 100644 index 000000000..e321a5a1d --- /dev/null +++ b/src/queryParser.js @@ -0,0 +1,203 @@ +// src/queryParser.js + + +function parseSelectQuery(query) { + // First, let's trim the query to remove any leading/trailing whitespaces + try{ + query = query.trim(); + + const limitRegex = /\sLIMIT\s(\d+)/i; + const orderByRegex = /\sORDER BY\s(.+)/i; + const groupByRegex = /\sGROUP BY\s(.+)/i; + const selectRegex = /^SELECT\s(.+?)\sFROM\s(.+)/i; + let isDistinct=false; + if (query.toUpperCase().includes('SELECT DISTINCT')) { + isDistinct = true; + query = query.replace('SELECT DISTINCT', 'SELECT'); + } + const limitMatch = query.match(limitRegex); + + let limit = null; + if (limitMatch) { + limit = parseInt(limitMatch[1],10); + query = query.replace(limitRegex,'') + } + console.log("limit",limit) + console.log(typeof(limit)) + + const orderByMatch = query.match(orderByRegex); + let orderByFields = null; + if (orderByMatch) { + orderByFields = orderByMatch[1].split(',').map(field => { + const [fieldName, order] = field.trim().split(/\s+/); + return { fieldName, order: order ? order.toUpperCase() : 'ASC' }; + }); + query = query.replace(orderByRegex, ''); + } + const groupByMatch = query.match(groupByRegex); + // Initialize variables for different parts of the query + let selectPart, fromPart; + + // Split the query at the WHERE clause if it exists + const whereSplit = query.split(/\sWHERE\s/i); + query = whereSplit[0]; // Everything before WHERE clause + + // WHERE clause is the second part after splitting, if it exists + let whereClause = whereSplit.length > 1 ? whereSplit[1].trim() : null; +if (whereClause && whereClause.includes('GROUP BY')) { + whereClause = whereClause.split(/\sGROUP\sBY\s/i)[0].trim(); +} +console.log(whereClause) + // Split the remaining query at the JOIN clause if it exists + const joinSplit = query.split(/\s(INNER|LEFT|RIGHT) JOIN\s/i); + selectPart = joinSplit[0].trim(); // Everything before JOIN clause + + // JOIN clause is the second part after splitting, if it exists + const joinPart = joinSplit.length > 1 ? joinSplit[1].trim() : null; + + // Parse the SELECT part + const selectMatch = selectPart.match(selectRegex); + if (!selectMatch) { + throw new Error('Invalid SELECT format'); + } + const [, fields, rawTable] = selectMatch; + + let joinType ; + let joinTable ; + let joinCondition ; + // Parse the JOIN part if it exists + if (joinPart) { + ( { joinType, joinTable, joinCondition } = parseJoinClause(query)); + }else{ + joinType=null; + joinTable=null; + joinCondition=null; + } + + // Parse the WHERE part if it exists + let whereClauses = []; + if (whereClause) { + whereClauses = parseWhereClause(whereClause); + } + + // Updated regex to capture GROUP BY clause + + const table = groupByMatch ? rawTable.split('GROUP BY')[0].trim() : rawTable.trim(); // Extract table name without GROUP BY + + + const aggregateFunctionRegex = /\b(COUNT|SUM|AVG|MIN|MAX)\(.+?\)/i; + const hasAggregateFunction = fields.match(aggregateFunctionRegex); + + let hasAggregateWithoutGroupBy = false; + let groupByFields = null; + + if (groupByMatch) { + groupByFields = groupByMatch[1].split(',').map(field => field.trim()); + } + if (hasAggregateFunction && !groupByMatch) { + hasAggregateWithoutGroupBy = true; + } + console.log("where clausese",whereClauses) + return { + fields: fields.split(',').map(field => field.trim()), + table: table.trim(), + whereClauses, + joinType, + joinTable, + joinCondition, + groupByFields, + hasAggregateWithoutGroupBy, + orderByFields, + limit, + isDistinct + }; +} +catch(error){ + console.log(error) + throw new Error(`Query parsing error: ${error.message}`) +} +} + +function parseDeleteQuery(query){ + // const deleteRegex = /^DELETE\s+FROM\s+\w+(\s+WHERE\s+.+)?;?$/i; + const deleteRegex = /DELETE FROM (\w+)( WHERE (.*))?/i; + const match = query.match(deleteRegex); + if (!match) { + throw new Error("Wrong DELETE syntax."); + } + const [, table, , whereString] = match; + let whereClauses = []; + if (whereString) { + whereClauses = parseWhereClause(whereString); + } + + return { + type: 'DELETE', + table: table.trim(), + whereClauses + }; +} + +// src/queryParser.js +function parseWhereClause(whereString) { + const conditionRegex =/(.*?)(=|!=|>|<|>=|<=)(.*)/; + return whereString.split(/ AND | OR /i).map(conditionString => { + if (conditionString.includes(' LIKE ')) + { + const [field, pattern] = conditionString.split(/\sLIKE\s/i); + return { field: field.trim(), operator: 'LIKE', value: pattern.trim().replace(/^'(.*)'$/, '$1') }; + }else{ + const match = conditionString.match(conditionRegex); + if (match) { + const [, field, operator, value] = match; + return { field: field.trim(), operator, value: value.trim() }; + } + throw new Error('Invalid WHERE clause format'); + } + }); +} + +function parseINSERTQuery(query){ + const insertRegex = /INSERT\s+INTO\s+([^\s\(]+)\s*\(([^)]+)\)\s*VALUES\s*\(([^)]+)\)/i; + const match = query.match(insertRegex) + + if(!match){ + throw new error("Wrong INSERT INTO syntax") + } + + const [, table, columns, values] = match; + return { + type:'INSERT', + table:table.trim(), + columns:columns.split(',').map(column => column.trim()), + values: values.split(',').map(value => value.trim()) + } +} + +function parseJoinClause(query) { + const joinRegex = /\s(INNER|LEFT|RIGHT) JOIN\s(.+?)\sON\s([\w.]+)\s*=\s*([\w.]+)/i; + const joinMatch = query.match(joinRegex); + + if (joinMatch) { + return { + joinType: joinMatch[1].trim(), + joinTable: joinMatch[2].trim(), + joinCondition: { + left: joinMatch[3].trim(), + right: joinMatch[4].trim() + } + }; + } + + return { + joinType: null, + joinTable: null, + joinCondition: null + }; +} + +const query = "SELECT DISTINCT name FROM student WHERE name LIKE '%e%"; +const res = parseSelectQuery(query) + + +module.exports = {parseSelectQuery, parseDeleteQuery,parseJoinClause, parseINSERTQuery}; \ No newline at end of file diff --git a/student.csv b/student.csv new file mode 100644 index 000000000..e9c960121 --- /dev/null +++ b/student.csv @@ -0,0 +1,5 @@ +id,name,age +1,John,30 +2,Jane,25 +3,Bob,22 +4,Alice,24 \ No newline at end of file diff --git a/tests/step-18/deleteExecutor.test.js b/tests/deleteExecuter.test.js similarity index 89% rename from tests/step-18/deleteExecutor.test.js rename to tests/deleteExecuter.test.js index 11ae617b7..f7c3eb5ae 100644 --- a/tests/step-18/deleteExecutor.test.js +++ b/tests/deleteExecuter.test.js @@ -1,5 +1,5 @@ -const { executeDELETEQuery } = require('../../src/index'); -const { readCSV, writeCSV } = require('../../src/csvReader'); +const { executeDELETEQuery } = require('../src/queryExecutor'); +const { readCSV, writeCSV } = require('../src/csvReader'); const fs = require('fs'); // Helper function to create courses.csv with initial data diff --git a/tests/index.test.js b/tests/index.test.js new file mode 100644 index 000000000..793600153 --- /dev/null +++ b/tests/index.test.js @@ -0,0 +1,102 @@ +// tests/index.test.js + +test('Basic Jest Test', () => { + expect(1).toBe(1); + }); + +// tests/index.test.js + +const readCSV = require('../src/csvReader'); + +test('Read CSV File', async () => { + const data = await readCSV('./student.csv'); + expect(data.length).toBeGreaterThan(0); + expect(data.length).toBe(3); + expect(data[0].name).toBe('John'); + expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later +}); + +// tests/index.test.js + +const parseQuery = require('../src/queryParser'); + +test('Parse SQL Query', () => { + const query = 'SELECT id, name FROM student'; + const parsed = parseQuery(query); + expect(parsed).toEqual({ + fields: ['id', 'name'], + table: 'student' + }); +}); + +// tests/index.test.js + +const executeSELECTQuery = require('../src/index'); + +test('Execute SQL Query', async () => { + const query = 'SELECT id, name FROM student'; + const result = await executeSELECTQuery(query); + expect(result.length).toBeGreaterThan(0); + expect(result[0]).toHaveProperty('id'); + expect(result[0]).toHaveProperty('name'); + expect(result[0]).not.toHaveProperty('age'); + expect(result[0]).toEqual({ id: '1', name: 'John' }); +}); + +// tests/index.test.js + +const executeSELECTQuery = require('../src/index'); + +test('Execute SQL Query with WHERE Clause', async () => { + const query = 'SELECT id, name FROM student WHERE age = 25'; + const result = await executeSELECTQuery(query); + expect(result.length).toBe(1); + expect(result[0]).toHaveProperty('id'); + expect(result[0]).toHaveProperty('name'); + expect(result[0].id).toBe('2'); +}); + +test('Parse SQL Query with Multiple WHERE Clauses', () => { + const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; + const parsed = parseQuery(query); + expect(parsed).toEqual({ + fields: ['id', 'name'], + table: 'student', + whereClauses: [{ + "field": "age", + "operator": "=", + "value": "30", + }, { + "field": "name", + "operator": "=", + "value": "John", + }] + }); +}); + +test('Execute SQL Query with Multiple WHERE Clause', async () => { + const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; + const result = await executeSELECTQuery(query); + expect(result.length).toBe(1); + expect(result[0]).toEqual({ id: '1', name: 'John' }); +}); + +// tests/index.test.js +test('Execute SQL Query with Greater Than', async () => { + const queryWithGT = 'SELECT id FROM student WHERE age > 22'; + const result = await executeSELECTQuery(queryWithGT); + expect(result.length).toEqual(2); + expect(result[0]).toHaveProperty('id'); +}); + +test('Execute SQL Query with Not Equal to', async () => { + const queryWithGT = 'SELECT name FROM student WHERE age != 25'; + const result = await executeSELECTQuery(queryWithGT); + expect(result.length).toEqual(2); + expect(result[0]).toHaveProperty('name'); +}); + +test('Parse SQL Query with INNER JOIN', async () => {/*implement*/}); +test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => {/*implement*/}); +test('Execute SQL Query with INNER JOIN', async () => {/*implement*/}); +test('Execute SQL Query with INNER JOIN and a WHERE Clause', async () => {/*implement*/}); \ No newline at end of file diff --git a/tests/step-17/insertExecuter.test.js b/tests/insertExecuter.test.js similarity index 89% rename from tests/step-17/insertExecuter.test.js rename to tests/insertExecuter.test.js index 8c405f727..0e27265a3 100644 --- a/tests/step-17/insertExecuter.test.js +++ b/tests/insertExecuter.test.js @@ -1,5 +1,5 @@ -const { executeINSERTQuery } = require('../../src/index'); -const { readCSV, writeCSV } = require('../../src/csvReader'); +const { executeINSERTQuery } = require('../src/queryExecutor'); +const { readCSV, writeCSV } = require('../src/csvReader'); const fs = require('fs'); // Helper function to create grades.csv with initial data diff --git a/tests/step-02/index.test.js b/tests/step-02/index.test.js index a5467ee48..59a3322e8 100644 --- a/tests/step-02/index.test.js +++ b/tests/step-02/index.test.js @@ -1,9 +1,9 @@ -const readCSV = require('../../src/csvReader'); +const {readCSV} = require('../../src/csvReader'); test('Read CSV File', async () => { - const data = await readCSV('./sample.csv'); + const data = await readCSV('./student.csv'); expect(data.length).toBeGreaterThan(0); - expect(data.length).toBe(3); + expect(data.length).toBe(4); expect(data[0].name).toBe('John'); expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later }); \ No newline at end of file diff --git a/tests/step-03/index.test.js b/tests/step-03/index.test.js index 9145ad3e4..b5cf79c0a 100644 --- a/tests/step-03/index.test.js +++ b/tests/step-03/index.test.js @@ -1,19 +1,29 @@ -const readCSV = require('../../src/csvReader'); -const parseQuery = require('../../src/queryParser'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery} = require('../../src/queryParser'); test('Read CSV File', async () => { - const data = await readCSV('./sample.csv'); + const data = await readCSV('./student.csv'); expect(data.length).toBeGreaterThan(0); - expect(data.length).toBe(3); + expect(data.length).toBe(4); expect(data[0].name).toBe('John'); expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later }); test('Parse SQL Query', () => { - const query = 'SELECT id, name FROM sample'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample' + table: 'student', + whereClauses:[], + joinTable:null, + joinCondition:null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); + }); \ No newline at end of file diff --git a/tests/step-04/index.test.js b/tests/step-04/index.test.js index bc353dd3d..1ba20fcac 100644 --- a/tests/step-04/index.test.js +++ b/tests/step-04/index.test.js @@ -1,26 +1,36 @@ -const readCSV = require('../../src/csvReader'); -const parseQuery = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { - const data = await readCSV('./sample.csv'); + const data = await readCSV('./student.csv'); expect(data.length).toBeGreaterThan(0); - expect(data.length).toBe(3); + expect(data.length).toBe(4); expect(data[0].name).toBe('John'); expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later }); test('Parse SQL Query', () => { - const query = 'SELECT id, name FROM sample'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample' + table: 'student', + whereClauses:[], + joinTable:null, + joinCondition:null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); + }); test('Execute SQL Query', async () => { - const query = 'SELECT id, name FROM sample'; + const query = 'SELECT id, name FROM student'; const result = await executeSELECTQuery(query); expect(result.length).toBeGreaterThan(0); expect(result[0]).toHaveProperty('id'); diff --git a/tests/step-05/index.test.js b/tests/step-05/index.test.js index 66a77c061..abb8ce0f7 100644 --- a/tests/step-05/index.test.js +++ b/tests/step-05/index.test.js @@ -1,27 +1,35 @@ -const readCSV = require('../../src/csvReader'); -const parseQuery = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { - const data = await readCSV('./sample.csv'); + const data = await readCSV('./student.csv'); expect(data.length).toBeGreaterThan(0); - expect(data.length).toBe(3); + expect(data.length).toBe(4); expect(data[0].name).toBe('John'); expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later }); test('Parse SQL Query', () => { - const query = 'SELECT id, name FROM sample'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample', - whereClause: null + table: 'student', + whereClauses: [], + joinTable:null, + joinCondition:null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Execute SQL Query', async () => { - const query = 'SELECT id, name FROM sample'; + const query = 'SELECT id, name FROM student'; const result = await executeSELECTQuery(query); expect(result.length).toBeGreaterThan(0); expect(result[0]).toHaveProperty('id'); @@ -31,17 +39,31 @@ test('Execute SQL Query', async () => { }); test('Parse SQL Query with WHERE Clause', () => { - const query = 'SELECT id, name FROM sample WHERE age = 25'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student WHERE age = 25'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample', - whereClause: 'age = 25' + table: 'student', + whereClauses: [{ + "field":"age", + "operator":"=", + "value":"25" + } + ], + joinTable:null, + joinCondition:null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); + }); test('Execute SQL Query with WHERE Clause', async () => { - const query = 'SELECT id, name FROM sample WHERE age = 25'; + const query = 'SELECT id, name FROM student WHERE age = 25'; const result = await executeSELECTQuery(query); expect(result.length).toBe(1); expect(result[0]).toHaveProperty('id'); diff --git a/tests/step-06/index.test.js b/tests/step-06/index.test.js index 2e2ef6416..2751391a8 100644 --- a/tests/step-06/index.test.js +++ b/tests/step-06/index.test.js @@ -1,27 +1,35 @@ -const readCSV = require('../../src/csvReader'); -const parseQuery = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { - const data = await readCSV('./sample.csv'); + const data = await readCSV('./student.csv'); expect(data.length).toBeGreaterThan(0); - expect(data.length).toBe(3); + expect(data.length).toBe(4); expect(data[0].name).toBe('John'); expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later }); test('Parse SQL Query', () => { const query = 'SELECT id, name FROM sample'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'sample', - whereClauses: [] + whereClauses: [], + joinTable:null, + joinCondition:null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Execute SQL Query', async () => { - const query = 'SELECT id, name FROM sample'; + const query = 'SELECT id, name FROM student'; const result = await executeSELECTQuery(query); expect(result.length).toBeGreaterThan(0); expect(result[0]).toHaveProperty('id'); @@ -31,21 +39,29 @@ test('Execute SQL Query', async () => { }); test('Parse SQL Query with WHERE Clause', () => { - const query = 'SELECT id, name FROM sample WHERE age = 25'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student WHERE age = 25'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample', + table: 'student', whereClauses: [{ field: "age", operator: "=", value: "25", }], + joinTable:null, + joinType:null, + joinCondition:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Execute SQL Query with WHERE Clause', async () => { - const query = 'SELECT id, name FROM sample WHERE age = 25'; + const query = 'SELECT id, name FROM student WHERE age = 25'; const result = await executeSELECTQuery(query); expect(result.length).toBe(1); expect(result[0]).toHaveProperty('id'); @@ -54,11 +70,11 @@ test('Execute SQL Query with WHERE Clause', async () => { }); test('Parse SQL Query with Multiple WHERE Clauses', () => { - const query = 'SELECT id, name FROM sample WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample', + table: 'student', whereClauses: [{ "field": "age", "operator": "=", @@ -67,12 +83,21 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { "field": "name", "operator": "=", "value": "John", - }] + }], + joinTable:null, + joinCondition:null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); + }); test('Execute SQL Query with Multiple WHERE Clause', async () => { - const query = 'SELECT id, name FROM sample WHERE age = 30 AND name = John'; + const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; const result = await executeSELECTQuery(query); expect(result.length).toBe(1); expect(result[0]).toEqual({ id: '1', name: 'John' }); diff --git a/tests/step-07/index.test.js b/tests/step-07/index.test.js index ee0ebed5e..156b6df17 100644 --- a/tests/step-07/index.test.js +++ b/tests/step-07/index.test.js @@ -1,27 +1,35 @@ -const readCSV = require('../../src/csvReader'); -const parseQuery = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { - const data = await readCSV('./sample.csv'); + const data = await readCSV('./student.csv'); expect(data.length).toBeGreaterThan(0); - expect(data.length).toBe(3); + expect(data.length).toBe(4); expect(data[0].name).toBe('John'); expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later }); test('Parse SQL Query', () => { const query = 'SELECT id, name FROM sample'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'sample', - whereClauses: [] + whereClauses: [], + joinType:null, + joinTable:null, + joinCondition:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Execute SQL Query', async () => { - const query = 'SELECT id, name FROM sample'; + const query = 'SELECT id, name FROM student'; const result = await executeSELECTQuery(query); expect(result.length).toBeGreaterThan(0); expect(result[0]).toHaveProperty('id'); @@ -31,21 +39,29 @@ test('Execute SQL Query', async () => { }); test('Parse SQL Query with WHERE Clause', () => { - const query = 'SELECT id, name FROM sample WHERE age = 25'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student WHERE age = 25'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample', + table: 'student', whereClauses: [{ field: "age", operator: "=", value: "25", }], + joinCondition: null, + joinTable: null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Execute SQL Query with WHERE Clause', async () => { - const query = 'SELECT id, name FROM sample WHERE age = 25'; + const query = 'SELECT id, name FROM student WHERE age = 25'; const result = await executeSELECTQuery(query); expect(result.length).toBe(1); expect(result[0]).toHaveProperty('id'); @@ -54,11 +70,11 @@ test('Execute SQL Query with WHERE Clause', async () => { }); test('Parse SQL Query with Multiple WHERE Clauses', () => { - const query = 'SELECT id, name FROM sample WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], - table: 'sample', + table: 'student', whereClauses: [{ "field": "age", "operator": "=", @@ -67,27 +83,36 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { "field": "name", "operator": "=", "value": "John", - }] + }], + joinCondition: null, + joinTable: null, + joinType:null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Execute SQL Query with Multiple WHERE Clause', async () => { - const query = 'SELECT id, name FROM sample WHERE age = 30 AND name = John'; + const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; const result = await executeSELECTQuery(query); expect(result.length).toBe(1); expect(result[0]).toEqual({ id: '1', name: 'John' }); }); test('Execute SQL Query with Greater Than', async () => { - const queryWithGT = 'SELECT id FROM sample WHERE age > 22'; + const queryWithGT = 'SELECT id FROM student WHERE age > 22'; const result = await executeSELECTQuery(queryWithGT); - expect(result.length).toEqual(2); + expect(result.length).toEqual(3); expect(result[0]).toHaveProperty('id'); + }); test('Execute SQL Query with Not Equal to', async () => { - const queryWithGT = 'SELECT name FROM sample WHERE age != 25'; + const queryWithGT = 'SELECT name FROM student WHERE age != 25'; const result = await executeSELECTQuery(queryWithGT); - expect(result.length).toEqual(2); + expect(result.length).toEqual(3); expect(result[0]).toHaveProperty('name'); }); \ No newline at end of file diff --git a/tests/step-08/index.test.js b/tests/step-08/index.test.js index aab1467e6..6bf56b3e7 100644 --- a/tests/step-08/index.test.js +++ b/tests/step-08/index.test.js @@ -1,24 +1,30 @@ -const readCSV = require('../../src/csvReader'); -const parseQuery = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); expect(data.length).toBeGreaterThan(0); - expect(data.length).toBe(3); + expect(data.length).toBe(4); expect(data[0].name).toBe('John'); expect(data[0].age).toBe('30'); //ignore the string type here, we will fix this later }); test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', whereClauses: [], + joinType: null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + joinTable: null, joinCondition: null, - joinTable: null + orderByFields:null, + limit: null, + isDistinct: false }); }); @@ -34,7 +40,7 @@ test('Execute SQL Query', async () => { test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -44,7 +50,13 @@ test('Parse SQL Query with WHERE Clause', () => { "value": "25", }], joinCondition: null, - joinTable: null + joinTable: null, + joinType: null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); @@ -59,7 +71,7 @@ test('Execute SQL Query with WHERE Clause', async () => { test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -73,7 +85,13 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { "value": "John", }], joinCondition: null, - joinTable: null + joinTable: null, + joinType: null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); @@ -87,38 +105,50 @@ test('Execute SQL Query with Complex WHERE Clause', async () => { test('Execute SQL Query with Greater Than', async () => { const queryWithGT = 'SELECT id FROM student WHERE age > 22'; const result = await executeSELECTQuery(queryWithGT); - expect(result.length).toEqual(2); + expect(result.length).toEqual(3); expect(result[0]).toHaveProperty('id'); }); test('Execute SQL Query with Not Equal to', async () => { const queryWithGT = 'SELECT name FROM student WHERE age != 25'; const result = await executeSELECTQuery(queryWithGT); - expect(result.length).toEqual(2); + expect(result.length).toEqual(3); expect(result[0]).toHaveProperty('name'); }); test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', whereClauses: [], joinTable: 'enrollment', - joinCondition: { left: 'student.id', right: 'enrollment.student_id' } + joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, + joinType: 'INNER', + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }); test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', whereClauses: [{ field: 'student.age', operator: '>', value: '20' }], joinTable: 'enrollment', - joinCondition: { left: 'student.id', right: 'enrollment.student_id' } + joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, + joinType: 'INNER', + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }); @@ -164,4 +194,25 @@ test('Execute SQL Query with INNER JOIN and a WHERE Clause', async () => { "enrollment.course": "Mathematics", "student.name": "John" })); +}); + +test('Execute SQL Query with LEFT JOIN', async () => { + const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; + const result = await executeSELECTQuery(query); + expect(result).toEqual(expect.arrayContaining([ + expect.objectContaining({ "student.name": "Alice", "enrollment.course": null }), + expect.objectContaining({ "student.name": "John", "enrollment.course": "Mathematics" }) + ])); + expect(result.length).toEqual(5); // 4 students, but John appears twice +}); + +test('Execute SQL Query with LEFT JOIN', async () => { + const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; + const result = await executeSELECTQuery(query); + expect(result).toEqual(expect.arrayContaining([ + expect.objectContaining({ "student.name": "Alice", "enrollment.course": null }), + expect.objectContaining({ "student.name": "John", "enrollment.course": "Mathematics" }) + ])); + + expect(result.length).toEqual(5); // 4 students, but John appears twice }); \ No newline at end of file diff --git a/tests/step-09/index.test.js b/tests/step-09/index.test.js index aaf711f5a..b065dab20 100644 --- a/tests/step-09/index.test.js +++ b/tests/step-09/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -12,14 +12,19 @@ test('Read CSV File', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', whereClauses: [], - joinCondition: null, + joinType: null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, joinTable: null, - joinType: null + joinCondition: null, + orderByFields:null, + limit: null, + isDistinct: false }); }); @@ -35,7 +40,7 @@ test('Execute SQL Query', async () => { test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -46,7 +51,12 @@ test('Parse SQL Query with WHERE Clause', () => { }], joinCondition: null, joinTable: null, - joinType: null + joinType: null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); @@ -61,7 +71,7 @@ test('Execute SQL Query with WHERE Clause', async () => { test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -76,7 +86,12 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { }], joinCondition: null, joinTable: null, - joinType: null + joinType: null, + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); @@ -103,41 +118,44 @@ test('Execute SQL Query with Not Equal to', async () => { test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', whereClauses: [], joinTable: 'enrollment', joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, - joinType: 'INNER' + joinType: 'INNER', + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }); test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', whereClauses: [{ field: 'student.age', operator: '>', value: '20' }], joinTable: 'enrollment', joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, - joinType: 'INNER' + joinType: 'INNER', + groupByFields: null, + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }); test('Execute SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; const result = await executeSELECTQuery(query); - /* - result = [ - { 'student.name': 'John', 'enrollment.course': 'Mathematics' }, - { 'student.name': 'John', 'enrollment.course': 'Physics' }, - { 'student.name': 'Jane', 'enrollment.course': 'Chemistry' }, - { 'student.name': 'Bob', 'enrollment.course': 'Mathematics' } - ] - */ + expect(result.length).toEqual(4); // toHaveProperty is not working here due to dot in the property name expect(result[0]).toEqual(expect.objectContaining({ @@ -149,20 +167,7 @@ test('Execute SQL Query with INNER JOIN', async () => { test('Execute SQL Query with INNER JOIN and a WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course, student.age FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 25'; const result = await executeSELECTQuery(query); - /* - result = [ - { - 'student.name': 'John', - 'enrollment.course': 'Mathematics', - 'student.age': '30' - }, - { - 'student.name': 'John', - 'enrollment.course': 'Physics', - 'student.age': '30' - } - ] - */ + expect(result.length).toEqual(2); // toHaveProperty is not working here due to dot in the property name expect(result[0]).toEqual(expect.objectContaining({ @@ -179,6 +184,7 @@ test('Execute SQL Query with LEFT JOIN', async () => { expect.objectContaining({ "student.name": "John", "enrollment.course": "Mathematics" }) ])); expect(result.length).toEqual(5); // 4 students, but John appears twice + }); test('Execute SQL Query with LEFT JOIN', async () => { @@ -188,5 +194,6 @@ test('Execute SQL Query with LEFT JOIN', async () => { expect.objectContaining({ "student.name": "Alice", "enrollment.course": null }), expect.objectContaining({ "student.name": "John", "enrollment.course": "Mathematics" }) ])); + expect(result.length).toEqual(5); // 4 students, but John appears twice }); \ No newline at end of file diff --git a/tests/step-10/index.test.js b/tests/step-10/index.test.js index 5e118eda5..30521ea39 100644 --- a/tests/step-10/index.test.js +++ b/tests/step-10/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery, parseJoinClause} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery, parseJoinClause} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -258,7 +258,7 @@ test('Average age of students above a certain age', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -268,12 +268,15 @@ test('Parse SQL Query', () => { joinType: null, groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -287,12 +290,15 @@ test('Parse SQL Query with WHERE Clause', () => { joinType: null, groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -310,12 +316,15 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { joinType: null, groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -325,12 +334,15 @@ test('Parse SQL Query with INNER JOIN', async () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }); test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -340,6 +352,9 @@ test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }); @@ -387,7 +402,7 @@ test('Returns null for queries without JOIN', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -397,12 +412,15 @@ test('Parse LEFT Join Query Completely', () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }) test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -412,12 +430,15 @@ test('Parse LEFT Join Query Completely', () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }) }) test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age > 22'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -427,12 +448,15 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main tabl "whereClauses": [{ "field": "student.age", "operator": ">", "value": "22" }], groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Physics'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -442,12 +466,15 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join tabl "whereClauses": [{ "field": "enrollment.course", "operator": "=", "value": "'Physics'" }], groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age < 25'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -457,12 +484,15 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main tab "whereClauses": [{ "field": "student.age", "operator": "<", "value": "25" }], groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Chemistry'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -472,89 +502,107 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join tab "whereClauses": [{ "field": "enrollment.course", "operator": "=", "value": "'Chemistry'" }], groupByFields: null, hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse COUNT Aggregate Query', () => { const query = 'SELECT COUNT(*) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['COUNT(*)'], table: 'student', whereClauses: [], groupByFields: null, hasAggregateWithoutGroupBy: true, - "joinCondition": null, - "joinTable": null, - "joinType": null, + joinCondition: null, + joinTable: null, + joinType: null, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse SUM Aggregate Query', () => { const query = 'SELECT SUM(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['SUM(age)'], table: 'student', whereClauses: [], groupByFields: null, hasAggregateWithoutGroupBy: true, - "joinCondition": null, - "joinTable": null, - "joinType": null, + joinCondition: null, + joinTable: null, + joinType: null, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse AVG Aggregate Query', () => { const query = 'SELECT AVG(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['AVG(age)'], table: 'student', whereClauses: [], groupByFields: null, hasAggregateWithoutGroupBy: true, - "joinCondition": null, - "joinTable": null, - "joinType": null, + joinCondition: null, + joinTable: null, + joinType: null, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse MIN Aggregate Query', () => { const query = 'SELECT MIN(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MIN(age)'], table: 'student', whereClauses: [], groupByFields: null, hasAggregateWithoutGroupBy: true, - "joinCondition": null, - "joinTable": null, - "joinType": null, + joinCondition: null, + joinTable: null, + joinType: null, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse MAX Aggregate Query', () => { const query = 'SELECT MAX(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MAX(age)'], table: 'student', whereClauses: [], groupByFields: null, hasAggregateWithoutGroupBy: true, - "joinCondition": null, - "joinTable": null, - "joinType": null, + joinCondition: null, + joinTable: null, + joinType: null, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse basic GROUP BY query', () => { const query = 'SELECT age, COUNT(*) FROM student GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -563,13 +611,16 @@ test('Parse basic GROUP BY query', () => { joinType: null, joinTable: null, joinCondition: null, - hasAggregateWithoutGroupBy: false + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse GROUP BY query with WHERE clause', () => { const query = 'SELECT age, COUNT(*) FROM student WHERE age > 22 GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -578,13 +629,16 @@ test('Parse GROUP BY query with WHERE clause', () => { joinType: null, joinTable: null, joinCondition: null, - hasAggregateWithoutGroupBy: false + hasAggregateWithoutGroupBy: false, + orderByFields:null, + limit: null, + isDistinct: false }); }); test('Parse GROUP BY query with multiple fields', () => { const query = 'SELECT student_id, course, COUNT(*) FROM enrollment GROUP BY student_id, course'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student_id', 'course', 'COUNT(*)'], table: 'enrollment', @@ -593,13 +647,17 @@ test('Parse GROUP BY query with multiple fields', () => { joinType: null, joinTable: null, joinCondition: null, - hasAggregateWithoutGroupBy: false + hasAggregateWithoutGroupBy: false, + orderByFields:null, + "limit": null, + isDistinct: false }); + }); test('Parse GROUP BY query with JOIN and WHERE clauses', () => { const query = 'SELECT student.name, COUNT(*) FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE enrollment.course = "Mathematics" GROUP BY student.name'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student.name', 'COUNT(*)'], table: 'student', @@ -611,6 +669,10 @@ test('Parse GROUP BY query with JOIN and WHERE clauses', () => { left: 'student.id', right: 'enrollment.student_id' }, - hasAggregateWithoutGroupBy: false + hasAggregateWithoutGroupBy: false, + orderByFields:null, + "limit": null, + isDistinct: false + }); }); \ No newline at end of file diff --git a/tests/step-11/index.test.js b/tests/step-11/index.test.js index 1cf5f2def..4a134e8dc 100644 --- a/tests/step-11/index.test.js +++ b/tests/step-11/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery, parseJoinClause} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery, parseJoinClause} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -53,14 +53,7 @@ test('Execute SQL Query with Not Equal to', async () => { test('Execute SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; const result = await executeSELECTQuery(query); - /* - result = [ - { 'student.name': 'John', 'enrollment.course': 'Mathematics' }, - { 'student.name': 'John', 'enrollment.course': 'Physics' }, - { 'student.name': 'Jane', 'enrollment.course': 'Chemistry' }, - { 'student.name': 'Bob', 'enrollment.course': 'Mathematics' } - ] - */ + expect(result.length).toEqual(4); // toHaveProperty is not working here due to dot in the property name expect(result[0]).toEqual(expect.objectContaining({ @@ -72,20 +65,7 @@ test('Execute SQL Query with INNER JOIN', async () => { test('Execute SQL Query with INNER JOIN and a WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course, student.age FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 25'; const result = await executeSELECTQuery(query); - /* - result = [ - { - 'student.name': 'John', - 'enrollment.course': 'Mathematics', - 'student.age': '30' - }, - { - 'student.name': 'John', - 'enrollment.course': 'Physics', - 'student.age': '30' - } - ] - */ + expect(result.length).toEqual(2); // toHaveProperty is not working here due to dot in the property name expect(result[0]).toEqual(expect.objectContaining({ @@ -258,7 +238,7 @@ test('Average age of students above a certain age', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -268,13 +248,15 @@ test('Parse SQL Query', () => { joinType: null, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -288,13 +270,15 @@ test('Parse SQL Query with WHERE Clause', () => { joinType: null, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -312,13 +296,15 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { joinType: null, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -328,13 +314,15 @@ test('Parse SQL Query with INNER JOIN', async () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }) }); test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -344,7 +332,9 @@ test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }) }); @@ -392,7 +382,7 @@ test('Returns null for queries without JOIN', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -402,13 +392,15 @@ test('Parse LEFT Join Query Completely', () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }) }) test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -418,13 +410,15 @@ test('Parse LEFT Join Query Completely', () => { joinCondition: { left: 'student.id', right: 'enrollment.student_id' }, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }) }) test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age > 22'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -434,13 +428,15 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main tabl "whereClauses": [{ "field": "student.age", "operator": ">", "value": "22" }], groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Physics'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -450,13 +446,15 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join tabl "whereClauses": [{ "field": "enrollment.course", "operator": "=", "value": "'Physics'" }], groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age < 25'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -466,13 +464,15 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main tab "whereClauses": [{ "field": "student.age", "operator": "<", "value": "25" }], groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Chemistry'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -482,14 +482,16 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join tab "whereClauses": [{ "field": "enrollment.course", "operator": "=", "value": "'Chemistry'" }], groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse COUNT Aggregate Query', () => { const query = 'SELECT COUNT(*) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['COUNT(*)'], table: 'student', @@ -499,14 +501,16 @@ test('Parse COUNT Aggregate Query', () => { "joinCondition": null, "joinTable": null, "joinType": null, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse SUM Aggregate Query', () => { const query = 'SELECT SUM(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['SUM(age)'], table: 'student', @@ -516,13 +520,15 @@ test('Parse SUM Aggregate Query', () => { "joinCondition": null, "joinTable": null, "joinType": null, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse AVG Aggregate Query', () => { const query = 'SELECT AVG(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['AVG(age)'], table: 'student', @@ -532,13 +538,15 @@ test('Parse AVG Aggregate Query', () => { "joinCondition": null, "joinTable": null, "joinType": null, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse MIN Aggregate Query', () => { const query = 'SELECT MIN(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MIN(age)'], table: 'student', @@ -548,13 +556,15 @@ test('Parse MIN Aggregate Query', () => { "joinCondition": null, "joinTable": null, "joinType": null, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse MAX Aggregate Query', () => { const query = 'SELECT MAX(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MAX(age)'], table: 'student', @@ -564,13 +574,16 @@ test('Parse MAX Aggregate Query', () => { "joinCondition": null, "joinTable": null, "joinType": null, - "orderByFields": null + "orderByFields": null, + "limit": null, + isDistinct: false }); }); test('Parse basic GROUP BY query', () => { const query = 'SELECT age, COUNT(*) FROM student GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); + expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -580,13 +593,15 @@ test('Parse basic GROUP BY query', () => { joinTable: null, joinCondition: null, hasAggregateWithoutGroupBy: false, - orderByFields: null + orderByFields: null, + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with WHERE clause', () => { const query = 'SELECT age, COUNT(*) FROM student WHERE age > 22 GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -596,13 +611,15 @@ test('Parse GROUP BY query with WHERE clause', () => { joinTable: null, joinCondition: null, hasAggregateWithoutGroupBy: false, - orderByFields: null + orderByFields: null, + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with multiple fields', () => { const query = 'SELECT student_id, course, COUNT(*) FROM enrollment GROUP BY student_id, course'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student_id', 'course', 'COUNT(*)'], table: 'enrollment', @@ -612,13 +629,15 @@ test('Parse GROUP BY query with multiple fields', () => { joinTable: null, joinCondition: null, hasAggregateWithoutGroupBy: false, - orderByFields: null + orderByFields: null, + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with JOIN and WHERE clauses', () => { const query = 'SELECT student.name, COUNT(*) FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE enrollment.course = "Mathematics" GROUP BY student.name'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student.name', 'COUNT(*)'], table: 'student', @@ -631,7 +650,9 @@ test('Parse GROUP BY query with JOIN and WHERE clauses', () => { right: 'enrollment.student_id' }, hasAggregateWithoutGroupBy: false, - orderByFields: null + orderByFields: null, + "limit": null, + isDistinct: false }); }); diff --git a/tests/step-12/index.test.js b/tests/step-12/index.test.js index d15c77ef5..7a0dd83f1 100644 --- a/tests/step-12/index.test.js +++ b/tests/step-12/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery, parseJoinClause} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery, parseJoinClause} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -53,14 +53,7 @@ test('Execute SQL Query with Not Equal to', async () => { test('Execute SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; const result = await executeSELECTQuery(query); - /* - result = [ - { 'student.name': 'John', 'enrollment.course': 'Mathematics' }, - { 'student.name': 'John', 'enrollment.course': 'Physics' }, - { 'student.name': 'Jane', 'enrollment.course': 'Chemistry' }, - { 'student.name': 'Bob', 'enrollment.course': 'Mathematics' } - ] - */ + expect(result.length).toEqual(4); // toHaveProperty is not working here due to dot in the property name expect(result[0]).toEqual(expect.objectContaining({ @@ -72,20 +65,7 @@ test('Execute SQL Query with INNER JOIN', async () => { test('Execute SQL Query with INNER JOIN and a WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course, student.age FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 25'; const result = await executeSELECTQuery(query); - /* - result = [ - { - 'student.name': 'John', - 'enrollment.course': 'Mathematics', - 'student.age': '30' - }, - { - 'student.name': 'John', - 'enrollment.course': 'Physics', - 'student.age': '30' - } - ] - */ + expect(result.length).toEqual(2); // toHaveProperty is not working here due to dot in the property name expect(result[0]).toEqual(expect.objectContaining({ @@ -258,7 +238,7 @@ test('Average age of students above a certain age', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -269,13 +249,14 @@ test('Parse SQL Query', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -290,13 +271,14 @@ test('Parse SQL Query with WHERE Clause', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -315,13 +297,14 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -332,13 +315,14 @@ test('Parse SQL Query with INNER JOIN', async () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }); test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -349,7 +333,8 @@ test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }); @@ -397,7 +382,7 @@ test('Returns null for queries without JOIN', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -408,13 +393,14 @@ test('Parse LEFT Join Query Completely', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }) test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -425,13 +411,14 @@ test('Parse LEFT Join Query Completely', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }) test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age > 22'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -442,13 +429,14 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main tabl groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Physics'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -459,13 +447,14 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join tabl groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age < 25'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -476,13 +465,14 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main tab groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Chemistry'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -493,14 +483,15 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join tab groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse COUNT Aggregate Query', () => { const query = 'SELECT COUNT(*) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['COUNT(*)'], table: 'student', @@ -511,14 +502,15 @@ test('Parse COUNT Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SUM Aggregate Query', () => { const query = 'SELECT SUM(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['SUM(age)'], table: 'student', @@ -529,13 +521,14 @@ test('Parse SUM Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse AVG Aggregate Query', () => { const query = 'SELECT AVG(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['AVG(age)'], table: 'student', @@ -546,13 +539,14 @@ test('Parse AVG Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse MIN Aggregate Query', () => { const query = 'SELECT MIN(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MIN(age)'], table: 'student', @@ -563,13 +557,14 @@ test('Parse MIN Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse MAX Aggregate Query', () => { const query = 'SELECT MAX(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MAX(age)'], table: 'student', @@ -580,13 +575,14 @@ test('Parse MAX Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse basic GROUP BY query', () => { const query = 'SELECT age, COUNT(*) FROM student GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -597,13 +593,14 @@ test('Parse basic GROUP BY query', () => { joinCondition: null, hasAggregateWithoutGroupBy: false, orderByFields: null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with WHERE clause', () => { const query = 'SELECT age, COUNT(*) FROM student WHERE age > 22 GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -614,13 +611,14 @@ test('Parse GROUP BY query with WHERE clause', () => { joinCondition: null, hasAggregateWithoutGroupBy: false, orderByFields: null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with multiple fields', () => { const query = 'SELECT student_id, course, COUNT(*) FROM enrollment GROUP BY student_id, course'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student_id', 'course', 'COUNT(*)'], table: 'enrollment', @@ -631,13 +629,14 @@ test('Parse GROUP BY query with multiple fields', () => { joinCondition: null, hasAggregateWithoutGroupBy: false, orderByFields: null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with JOIN and WHERE clauses', () => { const query = 'SELECT student.name, COUNT(*) FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE enrollment.course = "Mathematics" GROUP BY student.name'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student.name', 'COUNT(*)'], table: 'student', @@ -652,6 +651,7 @@ test('Parse GROUP BY query with JOIN and WHERE clauses', () => { hasAggregateWithoutGroupBy: false, orderByFields: null, "limit": null, + isDistinct: false }); }); @@ -709,6 +709,7 @@ test('Execute SQL Query with LIMIT clause exceeding total rows', async () => { test('Execute SQL Query with LIMIT 0', async () => { const query = 'SELECT id, name FROM student LIMIT 0'; const result = await executeSELECTQuery(query); + expect(result.length).toEqual(0); }); diff --git a/tests/step-13/index.test.js b/tests/step-13/index.test.js index 0797faaba..f230648e2 100644 --- a/tests/step-13/index.test.js +++ b/tests/step-13/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery, parseJoinClause} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery, parseJoinClause} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -258,7 +258,7 @@ test('Average age of students above a certain age', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -268,14 +268,15 @@ test('Parse SQL Query', () => { joinType: null, groupByFields: null, hasAggregateWithoutGroupBy: false, - "orderByFields": null, - "limit": null + orderByFields: null, + limit: null, + isDistinct: false }); }); test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -290,13 +291,14 @@ test('Parse SQL Query with WHERE Clause', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -315,13 +317,14 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -332,13 +335,14 @@ test('Parse SQL Query with INNER JOIN', async () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }); test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -349,7 +353,8 @@ test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }); @@ -397,7 +402,7 @@ test('Returns null for queries without JOIN', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -408,13 +413,14 @@ test('Parse LEFT Join Query Completely', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }) test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -425,13 +431,14 @@ test('Parse LEFT Join Query Completely', () => { groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }) }) test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age > 22'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -442,13 +449,14 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main tabl groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Physics'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -459,13 +467,14 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join tabl groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age < 25'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -476,13 +485,14 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main tab groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Chemistry'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -493,14 +503,15 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join tab groupByFields: null, hasAggregateWithoutGroupBy: false, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse COUNT Aggregate Query', () => { const query = 'SELECT COUNT(*) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['COUNT(*)'], table: 'student', @@ -511,14 +522,15 @@ test('Parse COUNT Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse SUM Aggregate Query', () => { const query = 'SELECT SUM(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['SUM(age)'], table: 'student', @@ -529,13 +541,14 @@ test('Parse SUM Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse AVG Aggregate Query', () => { const query = 'SELECT AVG(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['AVG(age)'], table: 'student', @@ -546,13 +559,14 @@ test('Parse AVG Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse MIN Aggregate Query', () => { const query = 'SELECT MIN(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MIN(age)'], table: 'student', @@ -563,13 +577,14 @@ test('Parse MIN Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse MAX Aggregate Query', () => { const query = 'SELECT MAX(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MAX(age)'], table: 'student', @@ -580,13 +595,14 @@ test('Parse MAX Aggregate Query', () => { "joinTable": null, "joinType": null, "orderByFields": null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse basic GROUP BY query', () => { const query = 'SELECT age, COUNT(*) FROM student GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -597,13 +613,14 @@ test('Parse basic GROUP BY query', () => { joinCondition: null, hasAggregateWithoutGroupBy: false, orderByFields: null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with WHERE clause', () => { const query = 'SELECT age, COUNT(*) FROM student WHERE age > 22 GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -614,13 +631,14 @@ test('Parse GROUP BY query with WHERE clause', () => { joinCondition: null, hasAggregateWithoutGroupBy: false, orderByFields: null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with multiple fields', () => { const query = 'SELECT student_id, course, COUNT(*) FROM enrollment GROUP BY student_id, course'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student_id', 'course', 'COUNT(*)'], table: 'enrollment', @@ -631,13 +649,14 @@ test('Parse GROUP BY query with multiple fields', () => { joinCondition: null, hasAggregateWithoutGroupBy: false, orderByFields: null, - "limit": null + "limit": null, + isDistinct: false }); }); test('Parse GROUP BY query with JOIN and WHERE clauses', () => { const query = 'SELECT student.name, COUNT(*) FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE enrollment.course = "Mathematics" GROUP BY student.name'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student.name', 'COUNT(*)'], table: 'student', @@ -652,6 +671,7 @@ test('Parse GROUP BY query with JOIN and WHERE clauses', () => { hasAggregateWithoutGroupBy: false, orderByFields: null, "limit": null, + isDistinct: false }); }); @@ -716,6 +736,7 @@ test('Execute SQL Query with LIMIT and ORDER BY clause', async () => { const query = 'SELECT id, name FROM student ORDER BY age DESC LIMIT 2'; const result = await executeSELECTQuery(query); expect(result.length).toEqual(2); + expect(result[0].name).toEqual('John'); expect(result[1].name).toEqual('Jane'); }); diff --git a/tests/step-14/index.test.js b/tests/step-14/index.test.js index 502411fa7..ad0c833b6 100644 --- a/tests/step-14/index.test.js +++ b/tests/step-14/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery, parseJoinClause} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery, parseJoinClause} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -258,7 +258,7 @@ test('Average age of students above a certain age', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -276,7 +276,7 @@ test('Parse SQL Query', () => { test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -298,7 +298,7 @@ test('Parse SQL Query with WHERE Clause', () => { test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -324,7 +324,7 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -342,7 +342,7 @@ test('Parse SQL Query with INNER JOIN', async () => { test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -402,7 +402,7 @@ test('Returns null for queries without JOIN', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -420,7 +420,7 @@ test('Parse LEFT Join Query Completely', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -438,7 +438,7 @@ test('Parse LEFT Join Query Completely', () => { test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age > 22'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -456,7 +456,7 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main tabl test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Physics'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -474,7 +474,7 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join tabl test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age < 25'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -492,7 +492,7 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main tab test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Chemistry'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -511,7 +511,7 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join tab test('Parse COUNT Aggregate Query', () => { const query = 'SELECT COUNT(*) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['COUNT(*)'], table: 'student', @@ -530,7 +530,7 @@ test('Parse COUNT Aggregate Query', () => { test('Parse SUM Aggregate Query', () => { const query = 'SELECT SUM(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['SUM(age)'], table: 'student', @@ -548,7 +548,7 @@ test('Parse SUM Aggregate Query', () => { test('Parse AVG Aggregate Query', () => { const query = 'SELECT AVG(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['AVG(age)'], table: 'student', @@ -566,7 +566,7 @@ test('Parse AVG Aggregate Query', () => { test('Parse MIN Aggregate Query', () => { const query = 'SELECT MIN(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MIN(age)'], table: 'student', @@ -584,7 +584,7 @@ test('Parse MIN Aggregate Query', () => { test('Parse MAX Aggregate Query', () => { const query = 'SELECT MAX(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MAX(age)'], table: 'student', @@ -602,7 +602,7 @@ test('Parse MAX Aggregate Query', () => { test('Parse basic GROUP BY query', () => { const query = 'SELECT age, COUNT(*) FROM student GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -620,7 +620,7 @@ test('Parse basic GROUP BY query', () => { test('Parse GROUP BY query with WHERE clause', () => { const query = 'SELECT age, COUNT(*) FROM student WHERE age > 22 GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -638,7 +638,7 @@ test('Parse GROUP BY query with WHERE clause', () => { test('Parse GROUP BY query with multiple fields', () => { const query = 'SELECT student_id, course, COUNT(*) FROM enrollment GROUP BY student_id, course'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student_id', 'course', 'COUNT(*)'], table: 'enrollment', @@ -656,7 +656,7 @@ test('Parse GROUP BY query with multiple fields', () => { test('Parse GROUP BY query with JOIN and WHERE clauses', () => { const query = 'SELECT student.name, COUNT(*) FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE enrollment.course = "Mathematics" GROUP BY student.name'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student.name', 'COUNT(*)'], table: 'student', diff --git a/tests/step-15/index.test.js b/tests/step-15/index.test.js index a2aa4daee..677646807 100644 --- a/tests/step-15/index.test.js +++ b/tests/step-15/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery, parseJoinClause} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery, parseJoinClause} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -258,7 +258,7 @@ test('Average age of students above a certain age', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -276,7 +276,7 @@ test('Parse SQL Query', () => { test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -298,7 +298,7 @@ test('Parse SQL Query with WHERE Clause', () => { test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -324,7 +324,7 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -342,7 +342,7 @@ test('Parse SQL Query with INNER JOIN', async () => { test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -402,7 +402,7 @@ test('Returns null for queries without JOIN', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -420,7 +420,7 @@ test('Parse LEFT Join Query Completely', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -438,7 +438,7 @@ test('Parse LEFT Join Query Completely', () => { test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age > 22'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -456,7 +456,7 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main tabl test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Physics'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -474,7 +474,7 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join tabl test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age < 25'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -492,7 +492,7 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main tab test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Chemistry'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -511,7 +511,7 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join tab test('Parse COUNT Aggregate Query', () => { const query = 'SELECT COUNT(*) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['COUNT(*)'], table: 'student', @@ -530,7 +530,7 @@ test('Parse COUNT Aggregate Query', () => { test('Parse SUM Aggregate Query', () => { const query = 'SELECT SUM(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['SUM(age)'], table: 'student', @@ -548,7 +548,7 @@ test('Parse SUM Aggregate Query', () => { test('Parse AVG Aggregate Query', () => { const query = 'SELECT AVG(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['AVG(age)'], table: 'student', @@ -566,7 +566,7 @@ test('Parse AVG Aggregate Query', () => { test('Parse MIN Aggregate Query', () => { const query = 'SELECT MIN(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MIN(age)'], table: 'student', @@ -584,7 +584,7 @@ test('Parse MIN Aggregate Query', () => { test('Parse MAX Aggregate Query', () => { const query = 'SELECT MAX(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MAX(age)'], table: 'student', @@ -602,7 +602,7 @@ test('Parse MAX Aggregate Query', () => { test('Parse basic GROUP BY query', () => { const query = 'SELECT age, COUNT(*) FROM student GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -620,7 +620,7 @@ test('Parse basic GROUP BY query', () => { test('Parse GROUP BY query with WHERE clause', () => { const query = 'SELECT age, COUNT(*) FROM student WHERE age > 22 GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -638,7 +638,7 @@ test('Parse GROUP BY query with WHERE clause', () => { test('Parse GROUP BY query with multiple fields', () => { const query = 'SELECT student_id, course, COUNT(*) FROM enrollment GROUP BY student_id, course'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student_id', 'course', 'COUNT(*)'], table: 'enrollment', @@ -656,7 +656,7 @@ test('Parse GROUP BY query with multiple fields', () => { test('Parse GROUP BY query with JOIN and WHERE clauses', () => { const query = 'SELECT student.name, COUNT(*) FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE enrollment.course = "Mathematics" GROUP BY student.name'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student.name', 'COUNT(*)'], table: 'student', diff --git a/tests/step-16/index.test.js b/tests/step-16/index.test.js index a2aa4daee..677646807 100644 --- a/tests/step-16/index.test.js +++ b/tests/step-16/index.test.js @@ -1,6 +1,6 @@ -const readCSV = require('../../src/csvReader'); -const {parseQuery, parseJoinClause} = require('../../src/queryParser'); -const executeSELECTQuery = require('../../src/index'); +const {readCSV} = require('../../src/csvReader'); +const {parseSelectQuery, parseJoinClause} = require('../../src/queryParser'); +const {executeSELECTQuery} = require('../../src/index'); test('Read CSV File', async () => { const data = await readCSV('./student.csv'); @@ -258,7 +258,7 @@ test('Average age of students above a certain age', async () => { test('Parse SQL Query', () => { const query = 'SELECT id, name FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -276,7 +276,7 @@ test('Parse SQL Query', () => { test('Parse SQL Query with WHERE Clause', () => { const query = 'SELECT id, name FROM student WHERE age = 25'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -298,7 +298,7 @@ test('Parse SQL Query with WHERE Clause', () => { test('Parse SQL Query with Multiple WHERE Clauses', () => { const query = 'SELECT id, name FROM student WHERE age = 30 AND name = John'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['id', 'name'], table: 'student', @@ -324,7 +324,7 @@ test('Parse SQL Query with Multiple WHERE Clauses', () => { test('Parse SQL Query with INNER JOIN', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id=enrollment.student_id'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -342,7 +342,7 @@ test('Parse SQL Query with INNER JOIN', async () => { test('Parse SQL Query with INNER JOIN and WHERE Clause', async () => { const query = 'SELECT student.name, enrollment.course FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE student.age > 20'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -402,7 +402,7 @@ test('Returns null for queries without JOIN', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -420,7 +420,7 @@ test('Parse LEFT Join Query Completely', () => { test('Parse LEFT Join Query Completely', () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id'; - const result = parseQuery(query); + const result = parseSelectQuery(query); expect(result).toEqual({ fields: ['student.name', 'enrollment.course'], table: 'student', @@ -438,7 +438,7 @@ test('Parse LEFT Join Query Completely', () => { test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age > 22'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -456,7 +456,7 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the main tabl test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student LEFT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Physics'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -474,7 +474,7 @@ test('Parse SQL Query with LEFT JOIN with a WHERE clause filtering the join tabl test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main table', async () => { const query = 'SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE student.age < 25'; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -492,7 +492,7 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the main tab test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join table', async () => { const query = `SELECT student.name, enrollment.course FROM student RIGHT JOIN enrollment ON student.id=enrollment.student_id WHERE enrollment.course = 'Chemistry'`; - const result = await parseQuery(query); + const result = await parseSelectQuery(query); expect(result).toEqual({ "fields": ["student.name", "enrollment.course"], "joinCondition": { "left": "student.id", "right": "enrollment.student_id" }, @@ -511,7 +511,7 @@ test('Parse SQL Query with RIGHT JOIN with a WHERE clause filtering the join tab test('Parse COUNT Aggregate Query', () => { const query = 'SELECT COUNT(*) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['COUNT(*)'], table: 'student', @@ -530,7 +530,7 @@ test('Parse COUNT Aggregate Query', () => { test('Parse SUM Aggregate Query', () => { const query = 'SELECT SUM(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['SUM(age)'], table: 'student', @@ -548,7 +548,7 @@ test('Parse SUM Aggregate Query', () => { test('Parse AVG Aggregate Query', () => { const query = 'SELECT AVG(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['AVG(age)'], table: 'student', @@ -566,7 +566,7 @@ test('Parse AVG Aggregate Query', () => { test('Parse MIN Aggregate Query', () => { const query = 'SELECT MIN(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MIN(age)'], table: 'student', @@ -584,7 +584,7 @@ test('Parse MIN Aggregate Query', () => { test('Parse MAX Aggregate Query', () => { const query = 'SELECT MAX(age) FROM student'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['MAX(age)'], table: 'student', @@ -602,7 +602,7 @@ test('Parse MAX Aggregate Query', () => { test('Parse basic GROUP BY query', () => { const query = 'SELECT age, COUNT(*) FROM student GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -620,7 +620,7 @@ test('Parse basic GROUP BY query', () => { test('Parse GROUP BY query with WHERE clause', () => { const query = 'SELECT age, COUNT(*) FROM student WHERE age > 22 GROUP BY age'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['age', 'COUNT(*)'], table: 'student', @@ -638,7 +638,7 @@ test('Parse GROUP BY query with WHERE clause', () => { test('Parse GROUP BY query with multiple fields', () => { const query = 'SELECT student_id, course, COUNT(*) FROM enrollment GROUP BY student_id, course'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student_id', 'course', 'COUNT(*)'], table: 'enrollment', @@ -656,7 +656,7 @@ test('Parse GROUP BY query with multiple fields', () => { test('Parse GROUP BY query with JOIN and WHERE clauses', () => { const query = 'SELECT student.name, COUNT(*) FROM student INNER JOIN enrollment ON student.id = enrollment.student_id WHERE enrollment.course = "Mathematics" GROUP BY student.name'; - const parsed = parseQuery(query); + const parsed = parseSelectQuery(query); expect(parsed).toEqual({ fields: ['student.name', 'COUNT(*)'], table: 'student', diff --git a/tests/step-17/index.test.js b/tests/step-17/index.test.js index c99d01fbb..02d6b479f 100644 --- a/tests/step-17/index.test.js +++ b/tests/step-17/index.test.js @@ -1,4 +1,4 @@ -const {readCSV} = require('../../src/csvReader'); +const {readCSV,writeCSV} = require('../../src/csvReader'); const {executeSELECTQuery } = require('../../src/index'); const { parseJoinClause, parseSelectQuery } = require('../../src/queryParser'); diff --git a/tests/step-18/insertExecuter.test.js b/tests/step-18/insertExecuter.test.js deleted file mode 100644 index 8c405f727..000000000 --- a/tests/step-18/insertExecuter.test.js +++ /dev/null @@ -1,33 +0,0 @@ -const { executeINSERTQuery } = require('../../src/index'); -const { readCSV, writeCSV } = require('../../src/csvReader'); -const fs = require('fs'); - -// Helper function to create grades.csv with initial data -async function createGradesCSV() { - const initialData = [ - { student_id: '1', course: 'Mathematics', grade: 'A' }, - { student_id: '2', course: 'Chemistry', grade: 'B' }, - { student_id: '3', course: 'Mathematics', grade: 'C' } - ]; - await writeCSV('grades.csv', initialData); -} - -// Test to INSERT a new grade and verify -test('Execute INSERT INTO Query for grades.csv', async () => { - // Create grades.csv with initial data - await createGradesCSV(); - - // Execute INSERT statement - const insertQuery = "INSERT INTO grades (student_id, course, grade) VALUES ('4', 'Physics', 'A')"; - await executeINSERTQuery(insertQuery); - - // Verify the new entry - const updatedData = await readCSV('grades.csv'); - const newEntry = updatedData.find(row => row.student_id === '4' && row.course === 'Physics'); - console.log(updatedData) - expect(newEntry).toBeDefined(); - expect(newEntry.grade).toEqual('A'); - - // Cleanup: Delete grades.csv - fs.unlinkSync('grades.csv'); -}); \ No newline at end of file diff --git a/tests/step-19/cli.js b/tests/step-19/cli.js deleted file mode 100644 index fbba6c02c..000000000 --- a/tests/step-19/cli.js +++ /dev/null @@ -1,53 +0,0 @@ -const child_process = require('child_process'); -const path = require('path'); - -test('DISTINCT with Multiple Columns via CLI', (done) => { - const cliPath = path.join(__dirname, '..', 'src', 'cli.js'); - const cliProcess = child_process.spawn('node', [cliPath]); - - let outputData = ""; - cliProcess.stdout.on('data', (data) => { - outputData += data.toString(); - }); - - cliProcess.on('exit', () => { - // Define a regex pattern to extract the JSON result - const cleanedOutput = outputData.replace(/\s+/g, ' '); - - const resultRegex = /Result: (\[.+\])/s; - const match = cleanedOutput.match(resultRegex); - // Fix JSON outputput - match[1] = match[1].replace(/'/g, '"').replace(/(\w+):/g, '"$1":'); - - if (match && match[1]) { - console.log(match[1]); - console.log(typeof match[1]) - // Parse the captured JSON string - // const results = JSON.parse(match[1]); - - // Validation logic - expect(JSON.parse(match[1])).toEqual //("[ { \"student_id\": \"1\", \"course\": \"Mathematics\" }, { \"student_id\": \"1\", \"course\": \"Physics\" }, { \"student_id\": \"2\", \"course\": \"Chemistry\" }, { \"student_id\": \"3\", \"course\": \"Mathematics\" }, { \"student_id\": \"5\", \"course\": \"Biology\" } ]") - ([ - { student_id: '1', course: 'Mathematics' }, - { student_id: '1', course: 'Physics' }, - { student_id: '2', course: 'Chemistry' }, - { student_id: '3', course: 'Mathematics' }, - { student_id: '5', course: 'Biology' }, - ]); - console.log("Test passed successfully"); - } else { - done() - throw new Error('Failed to parse CLI output'); - } - - done(); - }); - - // Introduce a delay before sending the query - setTimeout(() => { - cliProcess.stdin.write("SELECT DISTINCT student_id, course FROM enrollment\n"); - setTimeout(() => { - cliProcess.stdin.write("exit\n"); - }, 1000); // 1 second delay - }, 1000); // 1 second delay -}); \ No newline at end of file diff --git a/tests/step-19/deleteExecutor.test.js b/tests/step-19/deleteExecutor.test.js deleted file mode 100644 index 11ae617b7..000000000 --- a/tests/step-19/deleteExecutor.test.js +++ /dev/null @@ -1,31 +0,0 @@ -const { executeDELETEQuery } = require('../../src/index'); -const { readCSV, writeCSV } = require('../../src/csvReader'); -const fs = require('fs'); - -// Helper function to create courses.csv with initial data -async function createCoursesCSV() { - const initialData = [ - { course_id: '1', course_name: 'Mathematics', instructor: 'Dr. Smith' }, - { course_id: '2', course_name: 'Chemistry', instructor: 'Dr. Jones' }, - { course_id: '3', course_name: 'Physics', instructor: 'Dr. Taylor' } - ]; - await writeCSV('courses.csv', initialData); -} - -// Test to DELETE a course and verify -test('Execute DELETE FROM Query for courses.csv', async () => { - // Create courses.csv with initial data - await createCoursesCSV(); - - // Execute DELETE statement - const deleteQuery = "DELETE FROM courses WHERE course_id = '2'"; - await executeDELETEQuery(deleteQuery); - - // Verify the course was removed - const updatedData = await readCSV('courses.csv'); - const deletedCourse = updatedData.find(course => course.course_id === '2'); - expect(deletedCourse).toBeUndefined(); - - // Cleanup: Delete courses.csv - fs.unlinkSync('courses.csv'); -}); \ No newline at end of file diff --git a/tests/step-19/insertExecuter.test.js b/tests/step-19/insertExecuter.test.js deleted file mode 100644 index 8c405f727..000000000 --- a/tests/step-19/insertExecuter.test.js +++ /dev/null @@ -1,33 +0,0 @@ -const { executeINSERTQuery } = require('../../src/index'); -const { readCSV, writeCSV } = require('../../src/csvReader'); -const fs = require('fs'); - -// Helper function to create grades.csv with initial data -async function createGradesCSV() { - const initialData = [ - { student_id: '1', course: 'Mathematics', grade: 'A' }, - { student_id: '2', course: 'Chemistry', grade: 'B' }, - { student_id: '3', course: 'Mathematics', grade: 'C' } - ]; - await writeCSV('grades.csv', initialData); -} - -// Test to INSERT a new grade and verify -test('Execute INSERT INTO Query for grades.csv', async () => { - // Create grades.csv with initial data - await createGradesCSV(); - - // Execute INSERT statement - const insertQuery = "INSERT INTO grades (student_id, course, grade) VALUES ('4', 'Physics', 'A')"; - await executeINSERTQuery(insertQuery); - - // Verify the new entry - const updatedData = await readCSV('grades.csv'); - const newEntry = updatedData.find(row => row.student_id === '4' && row.course === 'Physics'); - console.log(updatedData) - expect(newEntry).toBeDefined(); - expect(newEntry.grade).toEqual('A'); - - // Cleanup: Delete grades.csv - fs.unlinkSync('grades.csv'); -}); \ No newline at end of file diff --git a/tests/step-20/deleteExecutor.test.js b/tests/step-20/deleteExecutor.test.js deleted file mode 100644 index 636403858..000000000 --- a/tests/step-20/deleteExecutor.test.js +++ /dev/null @@ -1,31 +0,0 @@ -const { executeDELETEQuery } = require('../../src/queryExecutor'); -const { readCSV, writeCSV } = require('../../src/csvReader'); -const fs = require('fs'); - -// Helper function to create courses.csv with initial data -async function createCoursesCSV() { - const initialData = [ - { course_id: '1', course_name: 'Mathematics', instructor: 'Dr. Smith' }, - { course_id: '2', course_name: 'Chemistry', instructor: 'Dr. Jones' }, - { course_id: '3', course_name: 'Physics', instructor: 'Dr. Taylor' } - ]; - await writeCSV('courses.csv', initialData); -} - -// Test to DELETE a course and verify -test('Execute DELETE FROM Query for courses.csv', async () => { - // Create courses.csv with initial data - await createCoursesCSV(); - - // Execute DELETE statement - const deleteQuery = "DELETE FROM courses WHERE course_id = '2'"; - await executeDELETEQuery(deleteQuery); - - // Verify the course was removed - const updatedData = await readCSV('courses.csv'); - const deletedCourse = updatedData.find(course => course.course_id === '2'); - expect(deletedCourse).toBeUndefined(); - - // Cleanup: Delete courses.csv - fs.unlinkSync('courses.csv'); -}); \ No newline at end of file diff --git a/tests/step-20/insertExecuter.test.js b/tests/step-20/insertExecuter.test.js deleted file mode 100644 index 581d17f73..000000000 --- a/tests/step-20/insertExecuter.test.js +++ /dev/null @@ -1,33 +0,0 @@ -const { executeINSERTQuery } = require('../../src/queryExecutor'); -const { readCSV, writeCSV } = require('../../src/csvReader'); -const fs = require('fs'); - -// Helper function to create grades.csv with initial data -async function createGradesCSV() { - const initialData = [ - { student_id: '1', course: 'Mathematics', grade: 'A' }, - { student_id: '2', course: 'Chemistry', grade: 'B' }, - { student_id: '3', course: 'Mathematics', grade: 'C' } - ]; - await writeCSV('grades.csv', initialData); -} - -// Test to INSERT a new grade and verify -test('Execute INSERT INTO Query for grades.csv', async () => { - // Create grades.csv with initial data - await createGradesCSV(); - - // Execute INSERT statement - const insertQuery = "INSERT INTO grades (student_id, course, grade) VALUES ('4', 'Physics', 'A')"; - await executeINSERTQuery(insertQuery); - - // Verify the new entry - const updatedData = await readCSV('grades.csv'); - const newEntry = updatedData.find(row => row.student_id === '4' && row.course === 'Physics'); - console.log(updatedData) - expect(newEntry).toBeDefined(); - expect(newEntry.grade).toEqual('A'); - - // Cleanup: Delete grades.csv - fs.unlinkSync('grades.csv'); -}); \ No newline at end of file