kódlefedettséget

Kódlefedettség, often translated as "code coverage," is a metric used in software testing to describe the degree to which the source code of a program is tested. It is an important measure of the thoroughness of testing. High code coverage does not necessarily guarantee the absence of bugs, but low code coverage indicates that a significant portion of the code has not been executed during testing, making it more likely to contain defects.

There are various types of code coverage, including statement coverage, branch coverage, and path coverage. Statement coverage measures whether each executable statement in the code has been executed. Branch coverage assesses whether each possible branch from a control structure (like an if-else statement or a switch statement) has been executed. Path coverage is the most comprehensive, aiming to execute every possible unique path through a function or program.

Code coverage is typically measured using automated tools that instrument the code before execution or analyze the execution trace afterward. The results are often presented as a percentage. For example, 80% statement coverage means that 80% of the executable statements in the program were run during the test suite.

While aiming for 100% code coverage might seem desirable, it can be impractical and sometimes not cost-effective. The effort required to achieve the last few percentage points might not be justified by the potential bugs found. The goal is to strike a balance, ensuring sufficient testing to provide confidence in the software's quality without an excessive investment in tests for rarely executed or non-critical code. Code coverage is a valuable indicator, but it should be used in conjunction with other quality assurance practices.