Implement POST API sample

Author: iamWing

src/apis/index.ts

@@ -1,5 +1,31 @@
-import { FastifyInstance } from 'fastify';
+import { FastifyInstance, RequestGenericInterface } from 'fastify';
+
+interface PostReqSchema extends RequestGenericInterface {
+  Body: { action: 'ping' }
+}
+
+// Request schema validation & response serialisation for POST API
+const postOpts = {
+  schema: {
+    body: {
+      type: 'object',
+      required: ['action'],
+      properties: {
+        action: { type: 'string', enum: ['ping'] },
+      },
+    },
+  },
+  response: {
+    200: {
+      value: { type: 'string' },
+    },
+  },
+};
 
 export default async (fastify: FastifyInstance): Promise<void> => {
   fastify.get('/', async (_req, _reply) => 'hello world');
+
+  fastify.post<PostReqSchema>('/', postOpts, async (req, reply) => {
+    await reply.code(200).send('pong');
+  });
 };

tests/apis/index.test.ts

@@ -7,11 +7,26 @@ beforeAll(async () => {
   server = await createServer();
 });
 
-test('root api', async () => {
-  const res = await server.inject().get('/');
+describe('APIs - /', () => {
+  test('GET /', async () => {
+    const res = await server.inject().get('/');
 
-  expect(res.statusCode).toBe(200);
-  expect(res.body).toMatch('hello world');
+    expect(res.statusCode).toBe(200);
+    expect(res.body).toMatch('hello world');
+  });
+
+  test('POST /', async () => {
+    const res = await server.inject().post('/').body({ action: 'ping' });
+
+    expect(res.statusCode).toBe(200);
+    expect(res.body).toMatch('pong');
+  });
+
+  test('Invalid POST /', async () => {
+    const res = await server.inject().post('/').body({ action: '' });
+
+    expect(res.statusCode).toBe(400);
+  });
 });
 
 afterAll(async () => {