davila7--claude-code-templates/cli-tool/components/commands/testing/generate-tests.md

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allowed-tools: Read, Write, Edit, Bash argument-hint: [file-path] | [component-name] description: Generate a complete test file for a specified source file or component. Use when the user explicitly asks to write, create, or generate tests for a specific file.

Generate Tests

Generate comprehensive test suite for: $ARGUMENTS

Current Testing Setup

• Test framework: !cat package.json 2>/dev/null | grep -E '"jest"|"vitest"|"mocha"|"jasmine"' | head -3 || cat jest.config.* vitest.config.* 2>/dev/null | head -5 || echo "Framework not detected"
• Existing tests: !find . -name "*.test.*" -o -name "*.spec.*" | head -5
• Test coverage: !npm run test:coverage 2>/dev/null || echo "No coverage script"
• Target: if $ARGUMENTS is a file path, read it with @$ARGUMENTS; if it is a component name, search for it with Grep before writing tests

Test Generation Framework

1. Analyze the target file/component structure — identify all exported functions, classes, methods, and their signatures
2. Strategy — examine existing test patterns in the project; choose unit vs integration scope; identify critical paths and error scenarios
3. Mock Design — map all external dependencies (I/O, APIs, timers, dates); create factories for test data; plan cleanup for async operations
4. Unit Tests — write isolated tests per function/method covering happy path, edge cases, and error conditions; follow AAA pattern (Arrange, Act, Assert)
5. Integration Tests — test component interactions, API layers with mocked responses, and end-to-end user workflows where applicable
6. Quality Check — verify naming describes behavior not implementation; confirm 80%+ coverage on critical business logic; ensure test isolation

Framework-Specific Guidance

• React: Component testing with React Testing Library; test user interactions and rendering
• Vue: Component testing with Vue Test Utils; test props, events, and slots
• Angular: Component and service testing with TestBed; test dependency injection
• Node.js: API endpoint and middleware testing; test request/response cycles
• Python: pytest with fixtures, unittest.mock for patching, pytest-cov for coverage
• Go: Table-driven tests in _test.go files, testify/assert for assertions, subtests via t.Run()
• Rust: #[cfg(test)] modules, #[test] attributes, mockall for mocking

Best Practices

• Follow AAA pattern (Arrange, Act, Assert)
• 80%+ coverage; prioritize critical business logic and error paths
• Mock external I/O; use factories for test data
• Naming: describe what the function does, not implementation details