js-testing

What problem does it solve?

JavaScript/TypeScript testing can be time-consuming and error-prone without a consistent framework and patterns. This skill provides structured guidance on test structure, mocking, assertions, fixtures, snapshots, and debugging.

Core Features & Use Cases

• Test structure patterns for Jest and Vitest, including describe/it blocks and co-located tests
• Mocking, spying, and assertion techniques with examples
• Snapshot and coverage workflows, debugging strategies, and Node's built-in test runner support
• Use cases include writing unit tests, debugging failures, setting up test frameworks, and maintaining test suites

Quick Start

Install and configure Jest or Vitest in your project and begin writing tests following the patterns above.