When doing unit testing, the code coverage rate is often used as the criteria for measuring testing performance, even in some cases code coverage may be used to consider whether the testing task is completed or not. So testers need to spend much time on designing test cases which can cover as many codes as possible. There are advantages and disadvantages about using code coverage rate.First let's check what is code coverage rate:code coverage rate= the degree of code coverage in testing.There are some ways to measure the degree of code coverage. Here we introduce some common used ways:1. State...