How do I handle asynchronous tests in my JavaScript code?

How do I handle asynchronous tests in my JavaScript code?

You can handle asynchronous tests in JavaScript using Promises, async/await, or callback functions. Which one are you using?

I'm using Jest for testing. Can you show me an example with async/await?

Sure! Here's a simple example:

test('fetches data', async () => {
  const data = await fetchData();
  expect(data).toBeDefined();
});

This test waits for fetchData to resolve before making the assertion.

What if the promise gets rejected?

In that case, you can use try/catch to handle the error. Here's how:

test('fetches data', async () => {
  try {
    const data = await fetchData();
    expect(data).toBeDefined();
  } catch (error) {
    expect(error).toBeDefined();
  }
});