init

backend/test/server.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, test } from 'vitest'
+import { serverOf } from '../src/server'
+
+describe('Server Testing', () => {
+  const server = serverOf()
+
+  test('When send a GET request to /ping, it should return status code 200', async () => {
+    // act: send a GET request to /ping
+    const response = await server.inject({
+      method: 'GET',
+      url: '/ping'
+    })
+
+    // assert: response should be status code 200
+    expect(response.statusCode).toBe(200)
+  })
+})

backend/test/todo.spec.ts

@@ -0,0 +1,26 @@
+import { afterAll, afterEach, beforeAll, describe, expect, test, vi } from 'vitest'
+import { serverOf } from '../src/server'
+import * as TodoRepo from '../src/repo/todo'
+
+describe('Todo API Testing', () => {
+  const server = serverOf()
+
+  afterEach(() => {
+    vi.resetAllMocks()
+  })
+
+  test('Given an empty array return from repo function, When send a GET request to /api/v1/todos, Then it should response an empty array', async () => {
+    // assert: stub the repo function to return an empty array
+    vi.spyOn(TodoRepo, 'findAllTodos').mockImplementation(async () => [])
+
+    // act: send a GET request to /api/v1/todos
+    const response = await server.inject({
+      method: 'GET',
+      url: '/api/v1/todos'
+    })
+
+    // assert: response should be an empty array
+    const todos = JSON.parse(response.body)['todos']
+    expect(todos).toStrictEqual([])
+  })
+})