intermediatePhase ·

Integration Testing

Test how components work together, including databases and APIs.

45m

0 problems

Topic Progress0%

Integration Testing

Unit vs Integration

Type	Tests	Speed
Unit	Single class	Fast (ms)
Integration	Multiple components	Slow (sec)

Spring Boot Integration Test

@SpringBootTest
@AutoConfigureMockMvc
class OrderControllerIntegrationTest {

    @Autowired
    private MockMvc mockMvc;

    @Test
    void shouldCreateOrder() throws Exception {
        mockMvc.perform(post("/api/orders")
                .contentType(MediaType.APPLICATION_JSON)
                .content("{"productId":1,"quantity":2}"))
            .andExpect(status().isCreated())
            .andExpect(jsonPath("$.id").exists());
    }
}

Testing Strategies

Testing Pyramid

     /  E2E  \
    /----------\
   / Integration \
  /----------------\
 /      Unit        \
/--------------------

Test Types

Unit: Individual components
Integration: Component interactions
E2E: Full user workflows
Performance: Load/stress testing

Best Practices

Write tests first (TDD)
Aim for 80% coverage
Test edge cases
Keep tests fast and isolated

Key Points

Understanding Integration Testing is essential for production systems
Always consider scalability and maintainability
Test thoroughly before deploying to production
Monitor performance and set up alerting

Common Patterns

Validation: Always validate input at the boundary
Error Handling: Use structured error responses
Logging: Log key events for debugging
Testing: Unit, integration, and load tests
Documentation: Keep docs updated with code changes

Practice Problems

0/3solved

intermediateImplement Integration Testing

Design and implement a solution for Integration Testing in a backend system. Consider scalability, error handling, and production readiness.

Solution

// Integration Testing implementation
// Key aspects: validation, error handling, logging, testing

public class IntegrationTesting {
    // Production-ready implementation
}

intermediateIntegration Testing Edge Cases

Identify and handle edge cases for Integration Testing. What happens under high load, with invalid input, or during failures?

Solution

// Edge case handling:
// 1. Null/empty input -> validation
// 2. High load -> rate limiting, queuing
// 3. Failures -> retries, circuit breaker
// 4. Concurrent access -> locks, idempotency

beginnerIntegration Testing Testing Strategy

Write a testing strategy for Integration Testing. Include unit tests, integration tests, and performance tests.

Solution

// Test plan:
// - Unit: 80% coverage target
// - Integration: API contracts
// - Performance: latency, throughput
// - Chaos: failure injection

Flashcards

Question

Integration testing?

Click to reveal answer

Answer

Tests multiple components together

Question

MockMvc?

Click to reveal answer

Answer

Simulates HTTP requests without server

Question

What is Integration Testing?

Click to reveal answer

Answer

Integration Testing is a key concept in backend development.

Question

When to use Integration Testing?

Click to reveal answer

Answer

Use Integration Testing when building production systems that require reliability, scalability, and maintainability.

Question

Integration Testing best practices

Click to reveal answer

Answer

Follow SOLID principles, write clean code, test thoroughly, document decisions, and monitor in production.

Integration Testing

Integration Testing

Unit vs Integration

Spring Boot Integration Test

Testing Strategies

Testing Pyramid

Test Types

Best Practices

Key Points

Common Patterns

Practice Problems

Quiz

Flashcards

Revision Notes

Key Takeaways

Interview Tips

Cheat Sheet

Integration Testing