Merge pull request #1806 from apollographql/testing-improvements

Testing improvements

.vscode/tasks.json

@@ -0,0 +1,27 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"label": "TypeScript watch",
+			"type": "shell",
+			"command": "./node_modules/.bin/tsc",
+			"args": [
+				"--build",
+				"tsconfig.build.json",
+				"--watch"
+			],
+			"isBackground": true,
+			"problemMatcher": [
+				"$tsc-watch"
+			],
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			},
+			"presentation": {
+				"reveal": "never",
+				"panel": "dedicated"
+			}
+		}
+	]
+}

__mocks__/apollo-server-env.ts

@@ -15,8 +15,8 @@ import {
 } from '../packages/apollo-server-env';
 
 interface FetchMock extends jest.Mock<typeof fetch> {
-  mockResponseOnce(data?: any, headers?: HeadersInit, status?: number);
-  mockJSONResponseOnce(data?: object, headers?: HeadersInit);
+  mockResponseOnce(data?: any, headers?: HeadersInit, status?: number): void;
+  mockJSONResponseOnce(data?: object, headers?: HeadersInit): void;
 }
 
 const mockFetch = jest.fn<typeof fetch>(fetch) as FetchMock;
@@ -46,16 +46,16 @@ mockFetch.mockJSONResponseOnce = (
   );
 };
 
-export {
-  mockFetch as fetch,
+const env = {
+  fetch: mockFetch,
   Request,
-  RequestInit,
   Response,
   Body,
-  BodyInit,
   Headers,
-  HeadersInit,
   URL,
   URLSearchParams,
-  URLSearchParamsInit,
 };
+
+jest.doMock('apollo-server-env', () => env);
+
+export = env;

jest.config.base.js

@@ -0,0 +1,33 @@
+const { defaults } = require("jest-config");
+
+module.exports = {
+  testEnvironment: "node",
+    setupFiles: [
+      "<rootDir>/../apollo-server-env/dist/index.js"
+    ],
+    preset: "ts-jest",
+    testMatch: null,
+    testRegex: "/__tests__/.*\\.test\\.(js|ts)$",
+    testPathIgnorePatterns: [
+      "/node_modules/",
+      "/dist/"
+    ],
+    moduleFileExtensions: [...defaults.moduleFileExtensions, "ts", "tsx"],
+    moduleNameMapper: {
+      '^__mocks__/(.*)$': '<rootDir>/../../__mocks__/$1',
+      // This regex should match the packages that we want compiled from source
+      // through `ts-jest`, as opposed to loaded from their output files in
+      // `dist`.
+      // We don't want to match `apollo-server-env` and
+      // `apollo-engine-reporting-protobuf`, because these don't depend on
+      // compilation but need to be initialized from as parto of `prepare`.
+      '^(?!apollo-server-env|apollo-engine-reporting-protobuf)(apollo-(?:server|datasource|cache-control|tracing|engine)[^/]*|graphql-extensions)(?:/dist)?((?:/.*)|$)': '<rootDir>/../../packages/$1/src$2'
+    },
+    clearMocks: true,
+    globals: {
+      "ts-jest": {
+        tsConfig: "<rootDir>/src/__tests__/tsconfig.json",
+        diagnostics: false
+      }
+    }
+};