Testing asynchronous code

• How to get Timer Mocks and Promises to play nice
• How to test Promise-based delay function
• Why doesn't setImmediate time out when using fake timers
• How to test a debounced function
• Test resolve and reject callbacks of a Promise

Mocking dependencies

• Mock a function in Jest
• Mock an API module dependency
• Mock a default export
• Mock an inner function in Jest
• Mock a Node.js module in TypeScript using Jest
• Mock delay from RxJs

General testing

• How to interactively debug Jest tests in VSCode
• Test recursive calls
• How does Jest allow mutation of modules
• Testing code using async / await with Mocha
• Using Jest property matchers on arrays of objects
• Spy on bound class method of a React component
• UnhandledPromiseRejectionWarning during test
• Does Jest have a --require option like Mocha

• javascript silver - 1,549th
• javascript bronze - 6,696th
• typescript bronze - 216th
• node.js bronze - 769th
• reactjs bronze - 312th
• jestjs gold - 2nd
• jestjs silver - 2nd
• jestjs bronze - 2nd
• unit-testing bronze - 196th
• enzyme bronze - 2nd
• testing bronze - 39th