How can I handle promise rejections in Jest?

How can I handle promise rejections in Jest?

You can handle promise rejections in Jest by using the rejects matcher. For example, you can write await expect(promise).rejects.toThrow();.

Can you give me an example of that?

Sure! If you have a function that returns a promise, you can test it like this:

it('should reject with an error', async () => {
  await expect(myAsyncFunction()).rejects.toThrow('Error message');
});

What if I want to test multiple rejections?

You can chain multiple tests for different rejections by creating separate test cases for each scenario. Just repeat the it block with different expectations.