What is test coverage and why is it important?

What is test coverage and why is it important?

Test coverage is a measure of how much of your code is tested by automated tests. It's important because it helps identify untested parts of your code, ensuring that more of your application is verified and reducing the risk of bugs.

How can I measure test coverage in my project?

You can measure test coverage using tools like Istanbul, JaCoCo, or Coverage.py, which analyze your code and report on the percentage of code that is executed during tests.

What are the different types of test coverage?

The main types of test coverage include line coverage, branch coverage, function coverage, and statement coverage. Each type provides insights into different aspects of your code's testing.

Is 100% test coverage necessary?

While 100% test coverage can be a goal, it's not always necessary. It's more important to focus on covering critical paths and potential failure points in your application.