Executing test cases with Jest
Jest is a JavaScript testing framework created by the team at Facebook. In this section, we will cover a brief overview of Jest and how we can use it to verify the output of test cases for React components.
Running tests with Jest
Most React projects are tested with Jest, so it makes sense to introduce this tool alongside learning React Testing Library. When we write our tests using React Testing Library, we need a test runner to execute the test.
Use the following command to install Jest in your project:
npm install --save-dev jest
We will run our React tests using Jest. At a high level, Jest provides the describe, it, test, and expect functions to organize and execute tests. You can think of the describe function as a test suite. Use the describe function to group related tests for specific components. The it and test functions are for specific tests. The it and test functions are interchangeable functions used to house and run the code...
