Test Writing Skill

Overview

Create thorough test coverage for software components.

Workflow

1. Analyze Code: Understand what needs testing
2. Identify Test Cases:
   • Happy path scenarios
   • Edge cases
   • Error conditions
   • Boundary values
3. Write Tests: Create test files following project conventions
4. Verify: Run tests to ensure they pass
5. Document: Add test descriptions

Test Types

Unit Tests

• Test individual functions/methods
• Mock dependencies
• Fast execution
• High coverage

Integration Tests

• Test component interactions
• Real dependencies when possible
• Test data flow
• API contracts

End-to-End Tests

• Test complete user workflows
• Real environment
• Critical paths
• User scenarios

Test Quality Standards

• Clear test names describing what is tested
• Arrange-Act-Assert pattern
• One assertion per test (generally)
• Independent tests (no shared state)
• Fast and reliable

Tools

• view: To read code being tested
• create_file: To create new test files
• run_terminal_command: To execute test suites
• grep_search: To find existing tests

Best Practices

• Test behavior, not implementation
• Cover edge cases thoroughly
• Keep tests maintainable
• Use descriptive test names
• Don't test framework code
• Mock external dependencies