The second szenario is using a stub.
Stub
#pragma once #include "WindowManager.hpp" class WindowManagerStub : public IWindowManager { public: bool drawAt(unsigned startX, unsigned endX, unsigned startY, unsigned endY) override; };
#include "WindowManagerStub.hpp" bool WindowManagerStub::drawAt(unsigned startX, unsigned endX, unsigned startY, unsigned endY) { return true; }
Test
#pragma once #include "WindowManager.hpp" #include "UserInterface.hpp" #include <gtest/gtest.h> #include <memory> class UserInterfaceTest : public testing::Test { protected: virtual void SetUp(); virtual void TearDown(); std::shared_ptr<IWindowManager> m_windowMgr; std::unique_ptr<UserInterface> m_userInter; };
#include "UserInterfaceTest.hpp" #include "WindowManagerStub.hpp" void UserInterfaceTest::SetUp() { m_windowMgr.reset(new WindowManagerStub()); m_userInter.reset(new UserInterface(m_windowMgr)); } void UserInterfaceTest::TearDown() {} TEST_F(UserInterfaceTest, loadWindow) { bool done = m_userInter->loadWindow(0, 100, 0, 100); EXPECT_EQ(done, true); }
App
#include <gtest/gtest.h> int main(int argc, char **argv) { testing::InitGoogleTest(&argc, argv); return RUN_ALL_TESTS(); }
Exec
$ g++ -c UserInterface.cpp WindowManager.cpp $ ar rcs libwnd.a UserInterface.o WindowManager.o $ g++ UserInterfaceTest.cpp WindowManagerStub.cpp Main.Test.cpp libwnd.a -lpthread -lgtest $ ./a.out [==========] Running 1 test from 1 test case. [----------] Global test environment set-up. [----------] 1 test from UserInterfaceTest [ RUN ] UserInterfaceTest.loadWindow [ OK ] UserInterfaceTest.loadWindow (0 ms) [----------] 1 test from UserInterfaceTest (0 ms total) [----------] Global test environment tear-down [==========] 1 test from 1 test case ran. (0 ms total) [ PASSED ] 1 test.