What are the best practices for ensuring coverage in my npm packages?

What are the best practices for ensuring coverage in my npm packages?

To ensure good coverage in your npm packages, consider the following best practices: 1. Write tests for all critical paths. 2. Use a coverage tool like Istanbul or NYC. 3. Aim for at least 80% coverage. 4. Regularly review and update tests as your code evolves.

How do I set up a coverage tool like Istanbul?

To set up Istanbul, first install it using npm: npm install --save-dev nyc. Then, add a test script in your package.json that runs your tests with coverage, like this: "test": "nyc mocha". Finally, run your tests using npm test.

What should I do if my coverage is below 80%?

If your coverage is below 80%, identify untested areas of your code using the coverage report. Focus on writing tests for critical functions and edge cases. You can also refactor complex code to make it easier to test.

Can you recommend some resources for learning more about testing in JavaScript?

Sure! Some great resources include: 1. 'JavaScript Testing Best Practices' on Medium. 2. The official documentation for Jest and Mocha. 3. 'Testing JavaScript' by Kent C. Dodds.