Test Automation

Create comprehensive test suites following the testing pyramid.

When to Use

• Setting up tests for new code
• User asks to "add tests" or "improve coverage"
• Before refactoring (add tests first)
• Implementing CI/CD test pipelines

Testing Pyramid

    /\        E2E (few, critical paths)
   /  \       Integration (moderate)
  /____\      Unit (many, fast)

Test Structure

Unit Tests

• Test individual functions/methods
• Mock external dependencies
• Fast execution (<100ms per test)
• High coverage (>80%)

Integration Tests

• Test component interactions
• Use test databases/containers
• Moderate execution time
• Cover critical integrations

E2E Tests

• Test complete user flows
• Use Playwright/Cypress
• Slowest execution
• Cover happy paths only

Test Patterns

// Arrange-Act-Assert
describe("UserService", () => {
  it("should create user with valid data", async () => {
    // Arrange
    const userData = { name: "Test", email: "test@example.com" };

    // Act
    const result = await userService.create(userData);

    // Assert
    expect(result.id).toBeDefined();
    expect(result.name).toBe("Test");
  });
});

Output

• Test files with clear naming
• Mock/stub implementations
• Test data factories
• Coverage configuration
• CI pipeline integration

Examples

Input: "Add tests for the auth module" Action: Analyze auth module, create unit tests for functions, integration tests for flows

Input: "Set up testing for this project" Action: Detect framework, configure test runner, create example tests, add CI config