VS2012 : Error with unit test : Assert::AreEqual( object, object ) didn't work

Question

I come to you for a strange problem when I use the Visual Studio Native Unit Test on VS 2012. I\'ve a Coordinates class like that:

#ifndef COORDINATES_HPP
#d         


        

Answer 1

Given the error message, you might try making your operator== more const friendly:

bool operator==( const Coordinates coordinates ) const;

Answer 2

The error received after creating your assignment operator, ie

Error 1 error C2338: Test writer must define specialization of ToString for your class class std::basic_string,class std::allocator > __cdecl Microsoft::VisualStudio::CppUnitTestFramework::ToString(const class Core::Coordinates &).

is related to needing to provide a way for the unit tests to print out the values it expected and received. You do this by creating a template specialization of the ToString function in the Microsoft::VisualStudio::CppUnitTestFramework namespace. For example:

namespace Microsoft{
    namespace VisualStudio {
        namespace CppUnitTestFramework {

            template<>
            static std::wstring ToString<Coordinates>(const Coordinates  & coord) {
                return L"Some string representing coordinate.";
            }

        }
    }
}

After that, the unit tests should run.