What is Code Coverage?
A metric that measures how much of the written code software tests actually run and check.
Overview
We write tests to understand whether every line of code you write in a software project works without errors. Code coverage calculates what percentage of your code these tests touch. A high ratio means your code is more secure and tested.
How it works
Automated testing tools are run during the software development process. These tools monitor every line of your code and mark the lines that the test goes over. Finally it gives you a report like '85% of code tested'.
Where it is used
It is used in software development processes, CI/CD lines and quality control reports.
Frequently asked questions
Is 100 percent code coverage always good?
No, it just shows that the code works; does not guarantee to cover logical errors or every scenario.
How do I measure this?
It can be measured automatically with test libraries suitable for the programming language you use (for example, coverage.py for Python).
Related terms
Related tools
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