4. Testing synchronous vs asynchronous code
This section of The Jest Handbook is dedicated to improving your understanding of Jest’s capabilities around synchronous vs asynchronous code.
You will learn to:
- test synchronous and asynchronous code that throws
- setting stubs to mock synchronous and asynchronous outputs
- failing tests programmatically to check error-handling code
Jest is Promise-aware and therefore supports
async functions as tests (async functions are Promises).