Chai Async Assertions vs Jest

What are the main differences between Chai async assertions and Jest?

Chai async assertions allow for more expressive testing with promises, while Jest provides built-in support for async/await.

Can you give me an example of how to use Chai async assertions?

Sure! You can use chai-as-promised to assert that a promise resolves to a specific value. For example:

const chai = require('chai');
const chaiAsPromised = require('chai-as-promised');
chai.use(chaiAsPromised);

const myPromise = () => Promise.resolve(42);

chai.expect(myPromise()).to.eventually.equal(42);

How does Jest handle async tests?

Jest handles async tests using async/await or returning a promise. You can simply declare your test function as async.

Which one is better for testing React applications?

Jest is often preferred for React applications due to its built-in features like snapshot testing and a rich ecosystem.