如何使用 GoogleTest 测试仅在 CPP 文件中定义的函数

Question

I'm new with GoogleTest framework and I have an issue related to testing utility methods that are only defined in the CPP file. In the following example I would like to test the function baz without exposing it through the .hpp file. What would be the best approach?

// .hpp
namespace ns {
  void foo();
  void bar();
}


// .cpp
#include ".hpp"

void baz() {
}

namespace ns {
  void foo() {
    baz();
  }

  void bar() {
    baz();
  }
}

Answer 1

You don't need to expose baz through the .hpp file. You can declare void baz(); in any file before its usage. Even inside a function, like

void foobar() {
  void baz();
  baz();
}