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Chapter 77: Testing TypeScript for AI Applications

Test the UI/SDK layer properly. This chapter builds a ts-testing skill for unit, integration, streaming, and contract tests on AI interactions.

Goals​

  • Write unit/integration tests with Vitest/Jest
  • Mock AI APIs and streaming responses
  • Implement contract tests to keep frontend/backend types in sync
  • Use TypeScript’s compiler as a safety net

Lesson Progression​

  • Testing foundations for TS projects
  • Mocking AI/streaming interactions
  • Contract testing for shared types
  • Capstone: test suite for your SDK/clients; finalize the skill

Outcome & Method​

You finish with a comprehensive test suite and a reusable TS testing skill.

Prerequisites​

  • Chapters 73-76