Jest Setup and Teardown

The video tutorial covers the use of Jest lifecycle methods to manage test environments, focusing on beforeEach and afterEach functions. It explains how to handle asynchronous code in Jest and demonstrates setting up test data for consistent test results. The tutorial includes testing login functionality and a challenge to test login failures, emphasizing the importance of a clean test environment.

What should be expected when logging in with correct credentials in a test case?

How do you handle bad credentials in a login test case?

What is the role of the 'expect' method in Jest testing?

Why is it important to remove challenge comments before running tests?