Jest Testing Patterns Master Jest testing patterns including unit tests, mocks, spies, snapshots, and assertion techniques for comprehensive test coverage. This skill covers the fundamental patterns and practices for writing effective, maintainable tests using Jest. Basic Test Structure Test Suite Organization Setup and Teardown Matchers and Assertions Common Matchers Async Assertions Mocking Function Mocks Module Mocking Partial Mocking Spies Spying on Methods Spying on Global Functions Snapshot Testing Basic Snapshots Property Matchers Custom Serializers Testing Patterns Testing React Compo…