The Node.js test runner
Our first test was a simple Node.js script with a single assertion. While this works for very basic cases, it doesn’t scale well as your test suite grows. Manually managing and running tests becomes tedious in larger projects.
A proper testing framework (or test runner) solves these common challenges by providing several useful features, such as the following:
- Organizing tests: Group related tests into files (usually one test file per source file) and keep tests isolated from one another.
- Simplifying execution: Run all tests (or a subset) with a single command. No need to run your own custom scripts one by one. During development, you can even run your tests in watch mode, which means that tests are automatically rerun if the source code changes.
- Clear and standard results: Show which tests passed, failed, or are still running with real-time feedback (e.g., color-coded results). Many frameworks can produce standard reporting...
