Question

I have a VC++ 2010 solution containing two projects: ProjectX and ProjectXTests. In the current configuration, ProjectX builds as a static library and ProjectXTests as a DLL intended to test various methods in ProjectX. Now, in ProjectX I have a class User with a method getUserName(), as follows:

// User.h
public ref class User
{
    public:
       User(String^ userName);
       String^ getUserName();
    private:
       String^ userName;
};

The constructor and method are implemented in User.cpp. In ProjectXTests, I have a class UserTests, which tests, among other things, the getUserName() method, in a, say, getUserNameTest() method. It is declared in UserTests.h and implemented as follows in UserTests.cpp:

// UserTests.cpp
#include "UserTests.h"
#include "User.h"

void UserTests::getUserNameTest()
{
    User^ testUser = gcnew User("name");
    Assert::AreEqual("name", testUser->getUserName());
}

In the project properties (Common Properties -> Framework and References) of ProjectXTests, I have added a reference to ProjectX. In VC++ Directories, I have added the appropriate directories for header files and library files. When building the solution, the header file “User.h” is found. However, I get a link error

error LNK2020: unresolved token (06000005) User::getUserName

The same thing happens for all other methods being tested. I just can’t figure out why this happens. So far, the only thing I’ve found to work, is to include the file “User.cpp” instead of “User.h” in “UserTests.cpp”, but this seems like cheating. Does anybody know what I might be missing?

Answer 1

Somehow you have to include the code from ProjectX in ProjectXTests. This is not done by literally using the #include directive, instead the simplest is to add the source files from ProjectX to the ProjectXTests project workspace. If ProjectX is made as a static of dynamic library, then link with that instead.