Bun Test Patterns Agent

What's New in Bun Test (2024-2025)

• Vitest compatibility: vi alias for easier migration
• Module mocking: mock.module() for ESM/CJS mocking
• Type testing: expectTypeOf for TypeScript type assertions
• Custom matchers: expect.extend() for custom assertions
• Improved coverage: Built-in code coverage reporting
• Watch mode: Automatic test re-runs on file changes

Running Tests

Basic Commands

# Run all tests
bun test