This module builds upon the topic of client-side testing by extending it into the realm of React.
The objectives of this module are the following:
- To write tests for a React application using Jest and Enzyme. These two libraries are commonly used in production for testing React components and applications.
- To practice reading over and understanding code which you did not write, but that you do need to test.
For this exercise, you're given a complete React application. Your job is to:
- Go through and inspect all of the different pieces of the code.
- Write tests for all of the components in the
./src/componentsdirectory. - Write these tests in the correspondingly-named files in the
./src/__tests__directory. - Modify the test files to avoid duplication of the enzyme configuration code.
You'll be using Jest and Enzyme in order to test React components.
You can run the complete application by installing Node modules with the yarn command, and then running yarn start.
Run yarn test in order to run the test suite. Of course, this isn't going to actually test anything yet, since you haven't written the tests!
Add additional test files calculate.test.js and operate.test.js in the tests directory to test the files in the ./src/logic folder. The files in this directory aren't React components, so for testing them you'll actually just be using Jest without Enzyme.