Add typescript support for jest (#3949) rizwanmustafa

* Add typescript support for jest

* Add typescript support for jest setup-tests.ts

* Some more bug fixing

backend/__tests__/setup-tests.ts

@@ -2,14 +2,14 @@ import { Collection, Db, MongoClient, WithId } from "mongodb";
 
 process.env.MODE = "dev";
 
-jest.mock("./src/init/db", () => ({
+jest.mock("../src/init/db", () => ({
   __esModule: true,
   getDb: (): Db => db,
   collection: <T>(name: string): Collection<WithId<T>> =>
     db.collection<WithId<T>>(name),
 }));
 
-jest.mock("./src/utils/logger", () => ({
+jest.mock("../src/utils/logger", () => ({
   __esModule: true,
   default: {
     error: console.error,

backend/__tests__/tsconfig.json

@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "incremental": true,
+    "module": "commonjs",
+    "target": "es6",
+    "sourceMap": false,
+    "allowJs": true,
+    "checkJs": true,
+    "outDir": "build",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "strictNullChecks": true,
+    "skipLibCheck": true,
+    "noEmit": true
+  },
+  "ts-node": {
+    "files": true
+  },
+  "include": ["./**/*.spec.ts", "./setup-tests.ts"]
+}

backend/jest.config.ts

@@ -3,7 +3,8 @@ import { defaults as tsjPreset } from "ts-jest/presets";
 export default {
   preset: "@shelf/jest-mongodb",
   transform: tsjPreset.transform,
-  setupFilesAfterEnv: ["<rootDir>/setup-tests.ts"],
+  setupFilesAfterEnv: ["<rootDir>/__tests__/setup-tests.ts"],
+  modulePathIgnorePatterns: ["<rootDir>/__tests__/setup-tests.ts"],
   coverageThreshold: {
     global: {
       // These percentages should never decrease