What Is Code Coverage?

Code coverage in unit testing measures the percentage of code lines or branches executed during test execution. It helps assess the thoroughness of testing and identifies areas of code that may need additional test coverage in software development.

Code coverage is calculated by measuring the percentage of code that has been executed during testing. It involves using tools that track which parts of the code are exercised by test cases, helping assess the thoroughness of testing efforts.

Good code coverage means that a significant portion of the source code has been exercised by tests. It ensures that the tests comprehensively validate the functionality and logic of the code.

Code coverage can be increased by writing additional test cases, covering different scenarios, and ensuring that existing test cases exercise all parts of the code, including branches and conditional statements.

Achieving 100% testing coverage is challenging and often impractical due to resource constraints. Focus should be on critical paths and high-risk areas to ensure effective coverage.