How can I handle async errors in Jest?

How can I handle async errors in Jest?

You can handle async errors in Jest by using try-catch blocks or returning a promise that rejects.

Can you give me an example of using try-catch in a test?

Sure! Here's a simple example:

it('should throw an error', async () => {
  try {
    await someAsyncFunction();
  } catch (error) {
    expect(error).toBeInstanceOf(Error);
  }
});

What about using promises directly?

You can return a promise in your test like this:

it('should reject with an error', () => {
  return expect(someAsyncFunction()).rejects.toThrow(Error);
});

Are there any best practices for testing async code?

Yes, always ensure your tests are clear and handle both resolved and rejected states. Use async/await for better readability.