单元测试中的错误LNK2019（CppUnitTestFramework） - C.

我正在尝试编写3个UnitTests . 在构建时，我收到一个错误致命错误LNK1120：1个未解析的外部 . 告诉我在哪个方向搜索！

完全错误：1> ProcessorsTests.obj：错误LNK2019：未解析的外部符号“public：static class IProcessor * __cdecl Processor_factory :: create_processor（char）”（？create_processor @ Processor_factory @@ SAPAVIProcessor @@ D @ Z）在函数“public”中引用：void __thiscall Luxoft_TestTests :: ProcessorsTests :: ProcessorAStartProcessor_NormalString_ReversedStringReturned（void）“（？ProcessorAStartProcessor_NormalString_ReversedStringReturned @ ProcessorsTests @ Luxoft_TestTests @@ QAEXXZ）

#include "stdafx.h"
#include "CppUnitTest.h"
#include <vector>
#include "../../../../../../Data/Cygwin/home/Nik/Luxoft_Test/Luxoft_Test/IProcessor.h"
#include "../../../../../../Data/Cygwin/home/Nik/Luxoft_Test/Luxoft_Test/Factory.h"
#include "../../../../../../Data/Cygwin/home/Nik/Luxoft_Test/Luxoft_Test/Processor.h"



using namespace std;
using namespace Microsoft::VisualStudio::CppUnitTestFramework;

namespace Luxoft_TestTests
{       
    TEST_CLASS(ProcessorsTests)
    {
    public :

        TEST_METHOD(ProcessorAStartProcessor_NormalString_ReversedStringReturned)
        {
            // arrange
            vector<string> example = { "This is normal text" };
            const vector<string> expected = { "text normal is This" };

            // action
            IProcessor* pr = Processor_factory::create_processor('A');
            const vector<string> actual = pr->Start_processor(example);
            delete pr;

            // assert
            Assert::IsTrue(equal(example.begin(), example.end(), expected.begin()));

            const char* message = "TestA passed";
            Logger::WriteMessage(message);
        }

        TEST_METHOD(ProcessorBStartProcessor_StringWithPoints_CommasReplacingPointsReturned)
        {
            // arrange
            vector<string> example = { "This.Is.Text.With.Punctuation" };
            vector<string> expected = { "This,Is,Text,With,Punctuation" };

            // action
            IProcessor* pr = Processor_factory::create_processor('B');
            vector<string> actual = pr->Start_processor(example);
            delete pr;

            // assert
            Assert::IsTrue(equal(example.begin(), example.end(), expected.begin()));

            const char* message = "TestB passed";
            Logger::WriteMessage(message);
        }

        TEST_METHOD(ProcessorCStartProcessor_StringWithSpaces_StringWithoutSpacesReturned)
        {
            // arrange
            vector<string> example = { "This is my text with spaces" };
            vector<string> expected = { "Thisismytextwithspaces" };

            // action
            IProcessor* pr = Processor_factory::create_processor('C');
            vector<string> actual = pr->Start_processor(example);
            delete pr;

            // assert
            Assert::IsTrue(equal(example.begin(), example.end(), expected.begin()));

            const char* message = "TestC passed";
            Logger::WriteMessage(message);

        }

    };
}