possibility to generate tests

Author: mightyaleksey

.eslintignore

@@ -1,3 +1,4 @@
 dist
 coverage
 node_modules
+test/common-test-cases.js

.npmignore

@@ -2,5 +2,6 @@
 
 .git*
 .npmignore
+generate-tests.js
 test/
 src/

generate-tests.js

@@ -0,0 +1,115 @@
+import { existsSync, readdirSync, writeFile } from 'fs';
+import { join, resolve, sep } from 'path';
+import { toArray } from 'lodash';
+
+const destination = resolve('test/common-test-cases.js');
+const cases = ['test-cases', 'cssi'];
+
+function resolveTo() {
+  const args = toArray(arguments);
+  return resolve(join.apply(null, ['test'].concat(args)));
+}
+
+let content =
+`import { equal } from 'assert';\n`+
+`import { readFileSync } from 'fs';\n`+
+`import { resolve } from 'path';\n`+
+`import { extend } from 'lodash';\n`+
+`import FileSystemLoader from 'css-modules-loader-core/lib/file-system-loader';\n`+
+`import hook from '../src';\n`+
+`\n`+
+`const normalize = str => str.replace(/\\r\\n?/g, '\\n');\n`+
+`const pipelines = {\n`+
+`  'test-cases': undefined,\n`+
+`  'cssi': [],\n`+
+`};\n`+
+`\n`+
+`let expectedCSS;\n`+
+`let expectedTokens;\n`+
+`\n`+
+`describe('common-test-cases', () => {\n`;
+
+cases.forEach(dirname => {
+  content +=
+  `\n`+
+  `  describe('${dirname}', () => {\n`;
+
+  readdirSync(resolveTo(dirname)).forEach(testCase => {
+    if (existsSync(resolveTo(dirname, testCase, 'source.css'))) {
+
+      content +=
+      `\n`+
+      `    describe('${testCase.replace(/-/g, ' ')}', () => {\n`+
+      `      before(() => {\n`+
+      `        expectedCSS = normalize(readFileSync(resolve('test${sep + dirname + sep + testCase + sep}expected.css'), 'utf8'));\n`+
+      `        expectedTokens = JSON.parse(readFileSync(resolve('test${sep + dirname + sep + testCase + sep}expected.json'), 'utf8'));\n`+
+      `        hook({rootDir: resolve('test${sep + dirname}'), use: pipelines['${dirname}']});\n`+
+      `      });\n`+
+      `\n`+
+      `      it('loader-core', done => {\n`+
+      `        const loader = new FileSystemLoader(resolve('test${sep + dirname}'), pipelines['${dirname}']);\n`+
+      `\n`+
+      `        loader.fetch('${testCase + sep}source.css', '/')\n`+
+      `          .then(tokens => {\n`+
+      `            equal(loader.finalSource, expectedCSS);\n`+
+      `            equal(JSON.stringify(tokens), JSON.stringify(expectedTokens));\n`+
+      `          })\n`+
+      `          .then(done, done);\n`+
+      `      });\n`+
+      `\n`+
+      `      it('require-hook', () => {\n`+
+      `        const tokens = require(resolve('test${sep + dirname + sep + testCase + sep}source.css'));\n`+
+      `        equal(JSON.stringify(tokens), JSON.stringify(expectedTokens));\n`+
+      `      });\n`+
+      `    });\n`;
+
+    } else {
+
+      content +=
+      `\n`+
+      `    describe('${testCase.replace(/-/g, ' ')}', () => {\n`+
+      `      before(() => {\n`+
+      `        expectedCSS = normalize(readFileSync(resolve('test${sep + dirname + sep + testCase + sep}expected.css'), 'utf8'));\n`+
+      `        expectedTokens = JSON.parse(readFileSync(resolve('test${sep + dirname + sep + testCase + sep}expected.json'), 'utf8'));\n`+
+      `        hook({rootDir: resolve('test${sep + dirname}'), use: pipelines['${dirname}']});\n`+
+      `      });\n`+
+      `\n`+
+      `      it('loader-core', done => {\n`+
+      `        const loader = new FileSystemLoader(resolve('test${sep + dirname}'), pipelines['${dirname}']);\n`+
+      `\n`+
+      `        loader.fetch('${testCase + sep}source1.css', '/').then(tokens1 => {\n`+
+      `          loader.fetch('${testCase + sep}source2.css', '/').then(tokens2 => {\n`+
+      `            equal(loader.finalSource, expectedCSS);\n`+
+      `            const tokens = extend({}, tokens1, tokens2);\n`+
+      `            equal(JSON.stringify(tokens), JSON.stringify(expectedTokens));\n`+
+      `          }).then(done, done);\n`+
+      `        }).catch(done);\n`+
+      `      });\n`+
+      `\n`+
+      `      it('require-hook', () => {\n`+
+      `        const tokens = extend({},\n`+
+      `          require(resolve('test${sep + dirname + sep + testCase + sep}source1.css')),\n`+
+      `          require(resolve('test${sep + dirname + sep + testCase + sep}source2.css'))\n`+
+      `        );\n`+
+      `\n`+
+      `        equal(JSON.stringify(tokens), JSON.stringify(expectedTokens));\n`+
+      `      });\n`+
+      `    });\n`;
+
+    }
+  });
+
+  content +=
+  `\n`+
+  `  });\n`;
+});
+
+content +=
+`\n`+
+`});\n`;
+
+writeFile(destination, content, 'utf8', err => {
+  if (err) {
+    throw err;
+  }
+});

package.json

@@ -38,6 +38,7 @@
     "pretest": "npm run -s lint",
     "test": "mocha --compilers js:babel/register",
     "test:cov": "`npm bin`/babel-node `npm bin`/isparta cover --report text --report html `npm bin`/_mocha",
+    "test:gen": "babel-node generate-tests",
     "build": "babel src --out-dir dist",
     "prepublish": "in-publish && npm run -s build || in-install"
   },

src/index.js

@@ -13,7 +13,7 @@ let rootDir = process.cwd();
 
 export default function (opts = {}) {
   plugins = opts.use ? opts.use : [ExtractImports, LocalByDefault, Scope];
-  rootDir = opts.root ? opts.root : process.cwd();
+  rootDir = opts.rootDir ? opts.rootDir : process.cwd();
 }
 
 function pathFetcher(_newPath, sourcePath, trace) {