visual studios 2013 template class non default constructor extern error

Question

So I'm having this error and I'm pulling my hair out. I'm in Visual Studios 2013 and am getting this error:

Error 1 error LNK2019: unresolved external symbol "public: __thiscall testClass::testClass(int)" (??0?$testClass@H@@QAE@H@Z) referenced in function _main D:\Source Code\My Projects\test c++\test c++ project\ErrorTesting\ErrorTesting\test.obj ErrorTesting

file: testclass.h

template<typename t>
class testClass
{
public:
    testClass(t test);
};

file: testclass.cpp

#include "testclass.h"
template<typename t>
testClass<t>::testClass(t test)
{

}

file:test.cpp

#include "testclass.h"
int main()
{
    testClass<int> temp(1);
    return 0;
}

Now I don't know why I can't call a non-default constructor with a template type but it compiles just fine if I call a default constructor.

Please note this is an example of the code that causes the error not my main project that I'm working on.