I have a scenario like below:

auto App::OnMethod() -> ::std::string<>
{
::std::string <> vRslt{ ::Service::Daemon::Run(*this, *this) };
return(vRslt);
}

I would like to write unit test for OnMethod, and I want to use gtest/gmock to create a mock for ::Service::Daemon::Run(*this, *this). This mock will return “SUCCESS”. However, I do not know how to mock for ::Service::Daemon::Run(*this, *this).

I appreciate for anyone guide me how to do that.

Thank you so much!