Bun Test Mocking Bun provides Jest-compatible mocking with , , and module mocking. Mock Functions jest.fn() Compatibility Mock Return Values Mock Implementations Spy on Methods Mock Modules Mock Node Modules Mock with Factory Mock Assertions Mock Properties Common Patterns Mock Fetch Mock Console Mock Class Methods Common Errors | Error | Cause | Fix | |-------|-------|-----| | | Property doesn't exist | Check property name | | | Trying to mock non-function | Use correct mock approach | | | Double mocking | Use mockRestore first | | | Wrong module path | Check path in mock.module | When to Lo…