typescript-testing

To write unit tests for TypeScript, you should structure tests to validate individual function outputs, mock external dependencies, and use type-safe assertions. This skill provides patterns for generating unit tests and structuring test suites to ensure code quality.

The best way to mock dependencies in TypeScript testing involves using built-in framework utilities to replace module exports with controlled fixtures. This skill demonstrates effective mocking patterns to isolate logic and ensure integration tests cover critical interactions without external side effects.

Yes, this skill supports both Jest and Vitest for TypeScript testing. It provides framework-agnostic patterns and best practices applicable to both frameworks, covering mocking, async operations, and component testing to ensure maintainability.

You should distribute unit, integration, and E2E tests based on optimal ratios to maximize coverage and reliability. This skill recommends a test distribution strategy that balances fast unit tests with critical integration and end-to-end interactions.

Yes, you can get clear, practical code examples for React component testing in TypeScript. This skill offers patterns for rendering components, simulating user interactions, and asserting behavior to maintain code quality.