Merge pull request #166 from 29ki/functions-jest-tests

Jest tests in functions

functions/jest.config.js

@@ -0,0 +1,6 @@
+/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  testPathIgnorePatterns: ['<rootDir>/lib'],
+};

functions/package.json

@@ -14,9 +14,10 @@
     "serve": "yarn build && firebase emulators:start --project demo-29k-cupcake --import emulatorSeed --export-on-exit",
     "shell": "yarn build && firebase functions:shell",
     "start": "yarn serve",
+    "test:jest": "jest",
     "test:lint": "eslint --ext .js,.ts",
     "test:ts": "tsc --noEmit",
-    "test": "yarn build:content && yarn test:ts && yarn test:lint"
+    "test": "yarn build:content && yarn test:ts && yarn test:lint && yarn test:jest"
   },
   "dependencies": {
     "@koa/router": "^12.0.0",
@@ -33,6 +34,7 @@
     "yup": "^0.32.11"
   },
   "devDependencies": {
+    "@types/jest": "^28.1.7",
     "@types/koa": "^2.13.5",
     "@types/koa__router": "^8.0.11",
     "@types/node-fetch": "2",
@@ -46,7 +48,9 @@
     "eslint-plugin-prettier": "^4.2.1",
     "firebase-functions-test": "^2.1.0",
     "firebase-tools": "^11.6.0",
+    "jest": "^28.1.3",
     "prettier": "^2.7.1",
+    "ts-jest": "^28.0.8",
     "typescript": "^4.5.4"
   }
 }

functions/src/api/lib/firebaseBodyParser.spec.ts

@@ -0,0 +1,30 @@
+import firebaseBodyParser, {FirebaseContext} from './firebaseBodyParser';
+
+describe('firebaseBodyParser', () => {
+  it('adds the already parsed firebase body to the koa request object', async () => {
+    const middleware = firebaseBodyParser();
+
+    const ctx = {
+      request: {
+        body: '{"foo":"bar"}',
+      },
+      req: {
+        body: {foo: 'bar'},
+      },
+    };
+    const next = jest.fn();
+
+    await middleware(ctx as FirebaseContext, next);
+
+    expect(ctx).toEqual({
+      request: {
+        body: {foo: 'bar'},
+      },
+      req: {
+        body: {foo: 'bar'},
+      },
+    });
+
+    expect(next).toBeCalledTimes(1);
+  });
+});