Module 10 — Testing TypeScript

Write comprehensive tests for TypeScript applications. Learn unit testing, type testing, and mocking for robust code.

📄️Unit Testing

Compare Jest vs Vitest for TypeScript. Learn to set up ts-jest for enterprise stability or Vitest for blazing-fast, Vite-powered type-safe testing.

📄️Type Testing

Move beyond value testing. Learn to use type assertions in Vitest and Jest to verify that your application's types and function signatures remain consistent.

📄️Mocking & Type Safety

Master type-safe mocking in TypeScript. Learn to eliminate 'any' from your tests using Vitest/Jest typed mocks, preserve generic inference, and prevent type erosion with strict assertions.

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Unit Testing