jest test

Dockerfile

@@ -4,7 +4,7 @@ COPY . .
 RUN npm ci
 
 FROM base AS test
-RUN jest
+CMD [ "npx", "jest", "--coverage" ]
 
 FROM base AS build
 RUN npm run build

README.md

@@ -15,4 +15,15 @@ The CI Pipeline uses [super-linter](https://github.com/super-linter/super-linter
 docker run -e RUN_LOCAL=true -e TYPESCRIPT_DEFAULT_STYLE=prettier -e VALIDATE_DOCKERFILE_HADOLINT=false -v $(pwd):/tmp/lint github/super-linter:slim-latest
 ```
 
-Note: We have disabled HADOLINT for now as we are getting an error: `qemu: uncaught target signal 11 (Segmentation fault) - core dumped`.
+Note: We have disabled HADOLINT for now as we are getting an error: `qemu: uncaught target signal 11 (Segmentation fault) - core dumped`.
+
+
+### Tests
+
+The CI Pipeline uses the `test` target from the Dockerfile to run the tests. You can run it locally with the following command:
+
+```bash
+docker compose -f docker-compose.test.yml up
+```
+
+Note: This will create a /coverage folder where you can review the coverage details.

__test__/app.test.ts

@@ -0,0 +1,10 @@
+import request from "supertest";
+import app from "../src/app";
+
+describe("GET /", () => {
+  it("should respond with 'Express + TypeScript Server'", async () => {
+    const response = await request(app).get("/");
+    expect(response.status).toBe(200);
+    expect(response.text).toBe("Express + TypeScript Server");
+  });
+});

docker-compose.test.yml

@@ -0,0 +1,32 @@
+version: '3.9'
+
+services:
+  app:
+    build:
+      context: .
+      target: test
+      dockerfile: Dockerfile
+    environment:
+      - PORT=3000
+      - MONGODB_HOST=mongo
+      - MONGODB_PORT=27017
+      - MONGODB_USER=root
+      - MONGODB_PASS=pass
+      - REDIS_QUEUE_HOST=localhost
+      - REDIS_QUEUE_PORT=6379
+    volumes:
+      - ./coverage:/project/coverage
+    depends_on:
+      - redis
+      - mongo
+  redis:
+    image: 'redis:alpine'
+    ports:
+      - 6379:6379
+  mongo:
+    image: 'mongo'
+    ports:
+      - 27017:27017
+    environment:
+      - MONGO_INITDB_ROOT_USERNAME=root
+      - MONGO_INITDB_ROOT_PASSWORD=pass

jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+};