Code integrity is a measurement used in software testing. It measures the how high the source code's quality is when it is passed on to the QA, and is affected by how extensively the code was unit tested and integration tested. Code integrity is a combination of code coverage and software quality, and is usually achieved by unit testing your code to reach high code coverage. The QA department can’t measure the code’s integrity even after all their tests are run. The only way to measure code integrity, and be sure of your code, is by unit testing your code, and reaching high code coverage.