With the CLI for Microsoft 365 we use Mocha for testing. Before getting active in Open Source I must admit that I wasn’t to aware of all testing frameworks. We applied unit tests in our projects, but never to the extend that we got to 100% code coverage. When doing my first PR on the CLI it turns out we had 100% code coverage, and the only way to get your PR approved was to include tests and stay on the 100% code coverage. ...