Test code coverage is a measure of how much of your code is being tested by your test suite. It is a way to quantify the effectiveness of your tests and ensure that your code is thoroughly tested.
Test code coverage is typically measured as a percentage of the lines of code that are executed during your tests. For example, if your test suite executes 80% of the lines of code in your project, then your test code coverage is 80%.
There are several types of test code coverage, including: