Testing Pyramid with Mock APIs

Mock API Builder enables you to create comprehensive test suites across all levels of the testing pyramid—from unit tests to end-to-end tests—without depending on real backend services.

Unit Tests

Test individual functions and components with mocked API responses

Integration Tests

Test API integrations and data flows with live mock endpoints

E2E Tests

Test complete user workflows with realistic mock API responses

Simulating Network Conditions

Real-world networks are unreliable. Mock API Builder allows you to simulate latency, timeouts, and random errors to ensure your application is resilient.

Latency Simulation

Test how your app handles slow connections by adding artificial delays.

Fast 3G~1500ms

Slow 3G~3000ms

Timeout5000ms+

Error Injection

Configure endpoints to randomly fail with specific error codes to test retry logic.

Rate Limiting429

Server Error500

Gateway Timeout504

Testing Retry Logic

Example of testing an exponential backoff strategy with simulated 500 errors.

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Unit Testing with Jest

Testing API Service Functions

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Testing React Components with Mock API

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Integration Testing

Testing Complete API Workflows

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Testing with Different HTTP Methods

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End-to-End Testing

Playwright E2E Tests

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Cypress E2E Tests

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Test Configuration

Jest Configuration

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Playwright Configuration

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Testing Best Practices

✓Use dedicated test projects separate mock APIs for testing to avoid affecting development
✓Test all HTTP methods verify GET, POST, PUT, PATCH, DELETE work correctly
✓Test error scenarios verify handling of 404, 500, and other error responses
✓Use environment variables configure API URLs via env vars, never hardcode
✓Isolate test data each test should be independent and not rely on previous tests
✓Test authentication flows verify login, token handling, and protected routes
✓Run tests in CI/CD automate test execution on every commit
✓Measure coverage aim for 80%+ code coverage on critical paths

Testing Pyramid with Mock APIs

Mock API Builder enables you to create comprehensive test suites across all levels of the testing pyramid—from unit tests to end-to-end tests—without depending on real backend services.

Unit Tests

Test individual functions and components with mocked API responses

Integration Tests

Test API integrations and data flows with live mock endpoints

E2E Tests

Test complete user workflows with realistic mock API responses

Simulating Network Conditions

Real-world networks are unreliable. Mock API Builder allows you to simulate latency, timeouts, and random errors to ensure your application is resilient.

Latency Simulation

Test how your app handles slow connections by adding artificial delays.

Fast 3G~1500ms

Slow 3G~3000ms

Timeout5000ms+

Error Injection

Configure endpoints to randomly fail with specific error codes to test retry logic.

Rate Limiting429

Server Error500

Gateway Timeout504

Testing Retry Logic

Example of testing an exponential backoff strategy with simulated 500 errors.

javascript

Testing Best Practices

✓Use dedicated test projects separate mock APIs for testing to avoid affecting development
✓Test all HTTP methods verify GET, POST, PUT, PATCH, DELETE work correctly
✓Test error scenarios verify handling of 404, 500, and other error responses
✓Use environment variables configure API URLs via env vars, never hardcode
✓Isolate test data each test should be independent and not rely on previous tests
✓Test authentication flows verify login, token handling, and protected routes
✓Run tests in CI/CD automate test execution on every commit
✓Measure coverage aim for 80%+ code coverage on critical paths

Automated Testing with Mock APIs

Testing Pyramid with Mock APIs

Simulating Network Conditions

Unit Testing with Jest

Integration Testing

End-to-End Testing

Test Configuration

Testing Best Practices

Automated Testing with Mock APIs

Testing Pyramid with Mock APIs

Simulating Network Conditions

Unit Testing with Jest

Integration Testing

End-to-End Testing

Test Configuration

Testing Best Practices