Testing Asynchronous Code

The video tutorial explains how to test asynchronous code using Jest. It covers the use of Jest's watch mode for automatic test reruns, creating basic asynchronous test cases, and handling asynchronous code with the done parameter. The tutorial also demonstrates testing promise-based functions and using async/await for cleaner code. The focus is on ensuring Jest recognizes asynchronous processes and waits for them to complete before determining test success or failure.

What is the primary goal of the lesson discussed in the text?

How can you test asynchronous code using Jest according to the text?

What command line argument can be added to the Jest command to enable watch mode?

What happens when you run tests in watch mode?

How does Jest handle asynchronous code if the 'done' parameter is not used?

What is the purpose of the 'done' parameter in Jest tests?

What is the expected behavior when an assertion fails in a Jest test?

What should you do if you want to test a function that returns a promise?

What is the significance of using async/await in testing asynchronous functions?

What steps are suggested for setting up a test environment for an API?