Test yazım standartları. TEST YAZARKEN veya TEST REVIEW yaparken otomatik uygula.
/\ E2E (10%) - Critical user paths
/ \
/────\ Integration (20%) - API, service
/ \
/────────\ Unit (70%) - Business logic
describe('UserService', () => {
describe('createUser', () => {
it('should create user with valid data', async () => {
// Arrange
const input = { email: '[email protected]', name: 'Test' }
// Act
const result = await userService.createUser(input)
// Assert
expect(result.email).toBe(input.email)
})
})
})
// ✅ Doğru
it('should return user when valid id provided')
it('should throw NotFoundError when user does not exist')
// ❌ Yanlış
it('should work correctly')
it('test createUser')
beforeEach(() => {
jest.clearAllMocks()
// Fresh state her testte
})
describe('calculateDiscount', () => {
it('should apply discount at exactly 100', () => {...})
it('should not apply below 100', () => {...})
it('should throw for negative', () => {...})
it('should handle null', () => {...})
})
// ✅ External dependency mock
const mockEmailService = {
send: jest.fn().mockResolvedValue(true)
}
// ❌ Internal helper mocklamaktan kaçın
describe('POST /api/users', () => {
it('should create user (201)', async () => {
const response = await request(app)
.post('/api/users')
.send({ email: '[email protected]', name: 'Test' })
.expect(201)
expect(response.body.success).toBe(true)
})
it('should return 400 for invalid email', async () => {
await request(app)
.post('/api/users')
.send({ email: 'invalid' })
.expect(400)
})
})
test('user registration flow', async ({ page }) => {
await page.goto('/register')
await page.fill('[data-testid="email"]', '[email protected]')
await page.click('[data-testid="submit"]')
await expect(page).toHaveURL('/dashboard')
})
| Tür | Minimum | İdeal |
|---|---|---|
| Unit | 70% | 85% |
| Integration | Kritik path | 80% |