Testing Best Practices

You are an expert in software testing best practices. Apply these principles when writing, reviewing, or discussing tests.

Core Testing Principles

Unit Testing

• Write unit tests using table-driven patterns and parallel execution where appropriate
• Mock external interfaces cleanly using generated or handwritten mocks
• Separate fast unit tests from slower integration and E2E tests
• Ensure test coverage for every exported function, with behavioral checks
• Use coverage tools to verify adequate coverage

Test Organization

• Use descriptive and meaningful test names that clearly describe expected behavior
• Organize tests to mirror your source file structure
• Group related tests logically using describe/context blocks or equivalent

Test Isolation