vscode-test VS mocha

Integration Tests combine multiple parts of your software and test them together. They are a good option for testing some behaviour of extensions. If you read the docs, they suggest using the @vscode/test-electron package and mocha. This will allow you to run tests inside an actual VSCode instance, so you avoid mocking. However, you are still constrained. The API gives limited information on many areas. For example even this very simple test is not easily realizable with the VSCode API:

At the beginning, I thought @vscode/test-electron didn't work well, but I can run https://github.com/microsoft/vscode-test without errors 😓

Using something like Vitest, Jest, or Mocha didn't work because:

MochaJS is a feature-rich JavaScript test framework running on Node.js, making it a popular choice for both backend and frontend testing. It's known for its flexibility and straightforward syntax, allowing for asynchronous testing and the use of any assertion library.

We use Jest Framework for testing. Jest is not a dogma, and, of course, in its place can be any other test runner, such as Mocha or Ava. Let's focus on tests. I'll provide a short example because I don’t want to waste your time. You can find the full version here. It's crucial to read the comments in the code below. Let's go!

JavaScript Popular tools for testing: Mocha, Jasmine, Unit JS, Jest

To execute your tests, you can create test scripts using popular testing frameworks like Mocha, Jasmine, or Jest. These frameworks provide a structured way to organize and run your tests, report results, and handle assertions.

⚗️ Mocha and Chai for testing

Testing frameworks like Jest, Mocha, and Jasmine are crucial for software development, ensuring code reliability and correctness. They offer features like test suites, test cases, assertions, and asynchronous testing support.