To consolidate the knowledge that I have been acquiring on the subject, I created this practical example of an automated unit/mutation testing framework built with Jest and StrykerJs.

I created a function to validate whether the user can drive, based on age and a valid driver's license. I consider, for instance, that a person can get a driver's license at the age of 18 and beyond.

I used the equivalence partitioning and boundary value analysis to devise the basic test cases:

1. Age of 17
2. Age of 18 and no valid driver's license
3. Age of 18 and a valid driver's license
4. Age of 19 and no valid driver's license
5. Age of 19 and a valid driver's license

The project is already configured to run the test coverage.

Tools:

• VSCode
• Jest
• StrykerJs

Run npm i to install the dev dependencies.

To run the tests via the command line of all test classes in the project:

npm run test

To run the tests via the command line of all test classes in the project:

npm run mutation

Running the tests make the application generates a test coverage report