决策覆盖测试

什么是决策覆盖测试？

决策覆盖或分支覆盖是一种测试方法，旨在确保每个决策点的每个可能分支至少执行一次，从而确保执行所有可达代码。

也就是说，每一个决定都是以各种方式做出的，真假。它有助于验证代码中的所有分支，确保没有分支导致应用程序的异常行为。

例子：

Read A
Read B 
IF A+B > 10 THEN 
  Print "A+B is Large" 
ENDIF 
If A > 5 THEN 
  Print "A Large"
ENDIF

上述逻辑可以用流程图表示为：

结果 ：

To calculate Branch  Coverage, one has to find out the minimum number of paths which will ensure that all the edges are covered. In this case there is no single path which will ensure coverage of  all the edges at once. The aim is to cover all possible true/false decisions.
(1) 1A-2C-3D-E-4G-5H
(2) 1A-2B-E-4F
Hence Decision or Branch Coverage is 2.