Code coverage is a metric used in software development to measure how much of the source code is executed during automated testing. It provides valuable insights into the quality and effectiveness of the test suite.
The code coverage percentage indicates the proportion of code lines that are executed by the tests. It helps identify areas of the codebase that are covered by the tests and areas that are not.
Higher code coverage suggests that a larger portion of the code has been tested, reducing the probability of undetected bugs and improving code reliability. However, high code coverage does not guarantee the absence of bugs or errors, as it only measures the execution of code and not the correctness of its implementation.
Code coverage can be measured at different levels, such as statement coverage, branch coverage, and path coverage. Statement coverage measures the percentage of individual lines of code executed. Branch coverage measures the percentage of decision points, such as if statements and loops, that have been evaluated in both true and false conditions. Path coverage measures the percentage of all possible paths through the code that have been tested.