What is a test runner?
A test runner is a tool that allows you to run tests on your code. It will execute your tests and give you feedback on whether they pass or fail. It can also provide you with additional information such as code coverage. There are many test runners available for Node.js, but we will focus on the built-in test runner that comes with Node.js.You don’t need to install any additional dependencies to use Node.js’s built-in test runner.