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Industry-standard Jest testing setup for TypeScript projects with guidance for React Testing Library, ts-jest, snapshots, and coverage configuration.
Provides a complete, practical guide to using Jest with TypeScript: configuration (ts-jest), recommended tsconfig/test settings, test patterns (unit, integration, snapshots), mocking strategies, and coverage setup. Includes examples for React Testing Library, timer mocks, and migration tips from Vitest.
Use this skill when you need to add or standardise testing in a TypeScript codebase, especially React or Node projects. Ideal for onboarding tests, setting coverage thresholds for CI, migrating from Vitest, or adding snapshot and integration testing.
Best consumed by developer-focused code assistants (Claude Code, Copilot-style agents) or CI automation tooling that can edit project config and run tests.
This skill has not been reviewed by our automated audit pipeline yet.