Add more FetchFunctions

Author: sgohlke

README.md

@@ -79,10 +79,16 @@ The following core functions can be used to create a new function or create dyna
 The following functions return a fix value. This can be helpful for testing code with different scenarios.
 
 -   **testDateFunction**: DateFunction that returns a fixed test date '1001-01-01T00:00:00.000Z'
+-   **badRequestFetchFunction**: FetchFunction that returns a fixed Response with and empty body and status 400 (Bad Request).
 -   **notFoundFetchFunction**: FetchFunction that returns a fixed Response with and empty body and status 404 (Not Found).
+-   **internalServerErrorFetchFunction**: FetchFunction that returns a fixed Response with and empty body and status 500 (Internal Server Error).
 -   **brokenJSONFetchFunction**: FetchFunction that returns a fixed Response with broken JSON (missing bracket)
 -   **unknownContentTypeFetchFunction**: FetchFunction that returns a fixed Response with an unknown Content-Type ('application/unknown')
 -   **timeoutFetchFunction**: FetchFunction that returns a fixed Response that throws a Timeout error.
+-   **aggregateErrorFetchFunction**: FetchFunction that returns a fixed Response with an AggregateError.
+-   **graphQLIntrospectionDisabledFetchFunction**: FetchFunction that returns a fixed Response that GraphQL introspection is disabled.
+-   **graphQLInvalidSchemaFetchFunction**: FetchFunction that returns a fixed Response with an invalid GraphQL schema.
+-   **graphQLInvalidBodyFetchFunction**: FetchFunction that returns a fixed Response with an invalid GraphQL body.
 -   **noCallbackTimeoutFunction**: TimeoutFunction that does not call the callback function but returns a fixed timeout ID 1.
 
 ## Contact

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@dreamit/funpara",
-    "version": "1.2.0",
+    "version": "1.3.0",
     "description": "Function parameter library for coding and testing",
     "scripts": {
         "build": "tsup-node",

src/index.ts

@@ -65,6 +65,13 @@ export function fixedResponseFetchFunction(
         Promise.resolve(new Response(bodyInit, init))
 }
 
+/**
+ * FetchFunction that returns a fixed Response with and empty body and status 400 (Bad Request).
+ */
+export const badRequestFetchFunction = fixedResponseFetchFunction(undefined, {
+    status: 400,
+})
+
 /**
  * FetchFunction that returns a fixed Response with and empty body and status 404 (Not Found).
  */
@@ -74,7 +81,15 @@ export const notFoundFetchFunction: FetchFunction = fixedResponseFetchFunction(
 )
 
 /**
- * FetchFunction that returns a fixed Response with  broken JSON (missing bracket)
+ * FetchFunction that returns a fixed Response with and empty body and status 500 (Internal Server Error).
+ */
+export const internalServerErrorFetchFunction = fixedResponseFetchFunction(
+    undefined,
+    { status: 500 },
+)
+
+/**
+ * FetchFunction that returns a fixed Response with broken JSON (missing bracket)
  */
 export const brokenJSONFetchFunction: FetchFunction =
     fixedResponseFetchFunction('{"data": {"message": "Missing bracket"}', {
@@ -100,6 +115,43 @@ export const timeoutFetchFunction: FetchFunction = (): Promise<Response> =>
         throw new Error('Connection failed ETIMEDOUT')
     })
 
+/**
+ * FetchFunction that returns a fixed Response with an AggregateError.
+ */
+export const aggregateErrorFetchFunction = fixedResponseFetchFunction(
+    '{"errors":[{"message":"aaa The first error!, The second error!", "originalError": {"errors": [{"message":"The first error!"}, {"message":"The second error!"}  ] }  }]}',
+    {
+        headers: { 'Content-Type': 'application/json' },
+        status: 200,
+    },
+)
+
+/**
+ * FetchFunction that returns a fixed Response that GraphQL introspection is disabled.
+ */
+export const graphQLIntrospectionDisabledFetchFunction =
+    fixedResponseFetchFunction(
+        '{"errors": [ { "message": "Introspection is disabled"}],"data": null}',
+        { status: 200 },
+    )
+
+/**
+ * FetchFunction that returns a fixed Response with an invalid GraphQL schema.
+ */
+export const graphQLInvalidSchemaFetchFunction = fixedResponseFetchFunction(
+    '{"data": {"__schema":"NotAGraphQLSchema", ' +
+        '"_service": {"sdl":"NotAGraphQLSchema"}}}',
+    { status: 200 },
+)
+
+/**
+ * FetchFunction that returns a fixed Response with an invalid GraphQL body.
+ */
+export const graphQLInvalidBodyFetchFunction = fixedResponseFetchFunction(
+    '{"message": "I am not GraphQL!"}',
+    { status: 200 },
+)
+
 // Exit function related types and functions
 
 /**

tests/index.test.ts

@@ -5,10 +5,16 @@ import type {
     TimeoutFunction,
 } from '@/index'
 import {
+    aggregateErrorFetchFunction,
+    badRequestFetchFunction,
     brokenJSONFetchFunction,
     doNotExitFunction,
     fixedDateFunction,
     fixedResponseFetchFunction,
+    graphQLIntrospectionDisabledFetchFunction,
+    graphQLInvalidBodyFetchFunction,
+    graphQLInvalidSchemaFetchFunction,
+    internalServerErrorFetchFunction,
     noCallbackTimeoutFunction,
     notFoundFetchFunction,
     nowDateFunction,
@@ -66,7 +72,7 @@ async function getUserById(
             `https://localhost:3000/users/${id}`,
         )
         if (!userDataResponse.ok) {
-            return 'User was not found'
+            return `User was not found. Status is ${userDataResponse.status}`
         }
         return `User ${await userDataResponse.text()}`
     } catch (error) {
@@ -137,16 +143,48 @@ test('Test fetch functions', async () => {
         ),
     ).toBe('User John Doe')
 
+    // Test that badRequestFetchFunction is handled properly
+    expect(await getUserById('1', badRequestFetchFunction)).toBe(
+        'User was not found. Status is 400',
+    )
+
     // Test that notFoundFetchFunction is handled properly
     expect(await getUserById('1', notFoundFetchFunction)).toBe(
-        'User was not found',
+        'User was not found. Status is 404',
+    )
+
+    // Test that internalServerErrorFetchFunction is handled properly
+    expect(await getUserById('1', internalServerErrorFetchFunction)).toBe(
+        'User was not found. Status is 500',
     )
 
     // Test that timeoutFetchFunction is handled properly
     expect(await getUserById('1', timeoutFetchFunction)).toBe(
         'Error: Error: Connection failed ETIMEDOUT',
     )
 
+    // Test that aggregateErrorFetchFunction is handled properly
+    expect(await getUserById('1', aggregateErrorFetchFunction)).toBe(
+        'User {"errors":[{"message":"aaa The first error!, The second error!", "originalError": {"errors": [{"message":"The first error!"}, {"message":"The second error!"}  ] }  }]}',
+    )
+
+    // Test that graphQLIntrospectionDisabledFetchFunction is handled properly
+    expect(
+        await getUserById('1', graphQLIntrospectionDisabledFetchFunction),
+    ).toBe(
+        'User {"errors": [ { "message": "Introspection is disabled"}],"data": null}',
+    )
+
+    // Test that graphQLInvalidSchemaFetchFunction is handled properly
+    expect(await getUserById('1', graphQLInvalidSchemaFetchFunction)).toBe(
+        'User {"data": {"__schema":"NotAGraphQLSchema", "_service": {"sdl":"NotAGraphQLSchema"}}}',
+    )
+
+    // Test that graphQLInvalidBodyFetchFunction is handled properly
+    expect(await getUserById('1', graphQLInvalidBodyFetchFunction)).toBe(
+        'User {"message": "I am not GraphQL!"}',
+    )
+
     // Test that fixedResponseFetchFunction with a JSON response return the correct response
     expect(
         await getJSONMessage(