In this lab, the code for a payments processor has been implemented, and your task is to write tests for each function:

• paymentService.js
• main.js
• queueService.js (you can do it in this order if you want to start with simpler tests before moving to harder tests)

IMPORTANT: not all functions will require mocking! If the function has a dependency on something from another file/library, mock that dependency. Otherwise, just test it like how you've been unit-testing functions

• Fork and clone repo
• Install dependencies: npm install
• cd into project directory
• Run tests: npm run test:watch
• You can also check your test coverage: npm run test:coverage