Add unit test for the Fastify API

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+name: Run tests
+
+on: push
+
+jobs:
+  run-tests:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v2
+    - name: Install bun
+      run: npm install -g bun
+    - name: Install dependencies
+      run: bun install
+    - name: Run tests
+      run: bun test

server.ts

@@ -14,7 +14,7 @@ import swaggerUI from "@fastify/swagger-ui";
 const SERVER_PORT = Number(process.env.PORT ?? 3000);
 const SERVER_HOST = process.env.SERVER_HOST ?? "localhost";
 
-const server: FastifyInstance = fastify({
+export const server: FastifyInstance = fastify({
   logger: process.env.NODE_DEVELOPMENT !== "test",
 });
 

stepci.js

@@ -0,0 +1,5 @@
+import { runFromFile } from '@stepci/runner';
+
+runFromFile('./tests/api.test.ts')
+  .then(console.log)
+  .catch(console.error);

tests/api.test.ts

@@ -0,0 +1,42 @@
+import { fastify } from 'fastify';
+import { Server, IncomingMessage, ServerResponse } from 'http';
+import app from '../app';
+
+let server: fastify.FastifyInstance<Server, IncomingMessage, ServerResponse>;
+
+beforeAll(async () => {
+  server = fastify();
+  server.register(app);
+  await server.ready();
+});
+
+afterAll(() => {
+  server.close();
+});
+
+describe('Fastify API', () => {
+  it('should respond with 200 on GET /api', async () => {
+    const response = await server.inject({
+      method: 'GET',
+      url: '/api',
+    });
+    expect(response.statusCode).toBe(200);
+  });
+
+  it('should respond with 200 on GET /api/hello', async () => {
+    const response = await server.inject({
+      method: 'GET',
+      url: '/api/hello',
+    });
+    expect(response.statusCode).toBe(200);
+  });
+
+  it('should respond with 200 and pong on GET /api/ping', async () => {
+    const response = await server.inject({
+      method: 'GET',
+      url: '/api/ping',
+    });
+    expect(response.statusCode).toBe(200);
+    expect(JSON.parse(response.body)).toEqual({ pong: 'it worked!' });
+  });
+});