如何使用 vsinstr/vsperfmon 获得真实的代码覆盖率

发布于 2024-08-05 13:32:58 字数 723 浏览 5 评论 0原文

我的基于微软的开发环境如下所示： - 巨大的原生 C++ 代码库，分为 10 个项目 - 每个项目都有一个依赖的测试项目（GoogleTest 单元测试），只需引用要测试的源。

我使用 vsinstr 和 vsperfmon（用于检测/监视可执行文件和 dll 的 Visual Studio 工具）生成了覆盖率报告，但这并不像我预期的那样令人满意，因为该报告仅显示单元测试行的覆盖率，而不显示单元测试行的覆盖率。正在测试的源（我检测了测试套件可执行文件 Sample_Project_Test.exe）。

例如，如果我有这样的方法：

(Sample_Project/add_ints.cpp)

int add(int a, int b){
  return a+b;
}

int add2(int a, int b){
  if (a == b)
    return a * 2;
  else
    return a+b;
}

并且单元测试如下：

(Sample_Project_Test/int_adds_tests.cpp)    

TEST(AddTest, ReturnsCorrectSum) 
{
  EXPECT_EQ(4, add(2,2));
}

我得到 100% 的行覆盖率，因为只测量了 add_ints.cpp 中的 add-part，add2 似乎被完全删除，因为它没有被触及。据我不明白整个覆盖范围的错误，这似乎不正确？

原文

my microsoft-based development environment looks like this:
- huge native c++ codebase, separated into 10 projects
- each project has a dependent test project (GoogleTest unit tests), the sources to test are simply referenced.

I generated the coverage-report using vsinstr and vsperfmon (the visual studio tools for instrumenting/monitoring executables and dlls), but that wasn't as satisfying as i expected because the report shows only the coverage of the unit-test lines, not of the sources under test (I instrumented the testsuite-executable Sample_Project_Test.exe).

For example if i have a method like this:

(Sample_Project/add_ints.cpp)

int add(int a, int b){
  return a+b;
}

int add2(int a, int b){
  if (a == b)
    return a * 2;
  else
    return a+b;
}

and the unit test is like this:

(Sample_Project_Test/int_adds_tests.cpp)    

TEST(AddTest, ReturnsCorrectSum) 
{
  EXPECT_EQ(4, add(2,2));
}

I get a line coverage of 100% because ONLY the add-part in add_ints.cpp is measured, add2 seems to be completely removed because it is not touched. As far as I did not understand the whole coverage thing wrong this seems not correct?

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