How can I perform async testing in different frameworks?

How can I perform async testing in different frameworks?

You can perform async testing using various frameworks like Jest, Mocha, and Jasmine. Each has its own methods for handling asynchronous code.

Can you give me an example of async testing in Jest?

Sure! In Jest, you can use async/await syntax. For example:

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

What about Mocha? How does it handle async tests?

In Mocha, you can use the done callback or return a promise. Here's an example using a promise:

it('fetches data', () => {
  return fetchData().then(data => {
    expect(data).to.equal('some data');
  });
});

Are there any specific tools for async testing?

Yes, tools like Sinon.js for spies and mocks, and Chai for assertions can enhance your async testing experience.