Unit Test Coverage Tools

Introduction

This lesson is a practical implementation of the theory taught in the “Unit Test Coverage: Concepts and Techniques” lesson.

Before diving into more practical aspects, let’s briefly recap unit test coverage theory. Test coverage is a measure of the degree to which the application code is executed when test code is run. The test code may enhance test coverage by increasing the branch coverage of the application code. Branch coverage is the ratio of the number of executed branches in an application’s code to the total number of branches in the code. Control structures include selection statements and iteration statements. Selection statements include the if, if else, and switch statements. Iteration statements include the do, for, for each, and while statements.

You can think of branch coverage qualitatively and quantitatively. Its quantitative measurement is given by the following equation:

$\mathsf{B}\mathsf{r}\mathsf{a}\mathsf{n}\mathsf{c}\mathsf{h}\mathsf{c}\mathsf{o}\mathsf{v}\mathsf{e}\mathsf{r}\mathsf{a}\mathsf{g}\mathsf{e}={\displaystyle \frac{\mathsf{B}\mathsf{r}\mathsf{a}\mathsf{n}\mathsf{c}\mathsf{h}\mathsf{e}\mathsf{s}\mathsf{t}\mathsf{r}\mathsf{a}\mathsf{v}}{}}$ ...