How do I handle errors in async functions using Jest?

How do I handle errors in async functions using Jest?

You can handle errors in async functions by using try-catch blocks. Here's an example:

test('async error handling', async () => {
  try {
    await asyncFunctionThatMightFail();
  } catch (error) {
    expect(error).toBeDefined();
  }
});

What if I want to test that a specific error is thrown?

You can use Jest's rejects matcher to test for specific errors. For example:

test('throws specific error', async () => {
  await expect(asyncFunctionThatMightFail()).rejects.toThrow('Specific error message');
});

Can I mock the async function to control its behavior?

Yes, you can mock the async function using Jest's jest.mock or jest.fn(). This allows you to simulate different scenarios.

What about testing multiple async functions?

You can test multiple async functions in a single test by chaining them with Promise.all or by using separate tests for each function.