CMake 用于 Google 测试

Question

我正在尝试按照本教程进行运行宁 Google 测试文件，但我在 CMakeLists.txt 上遇到了一些问题。

https://www.eriksmistad.no/getting-started-with-google-test-on-ubuntu/

CMakeLists.txt:

cmake_minimum_required(VERSION 2.6)

# Locate GTest
find_package(GTest REQUIRED)
include_directories(${GTEST_INCLUDE_DIRS})

# Link runTests with what we want to test and the GTest and pthread library
add_executable(runTests tests.cpp)
target_link_libraries(runTests ${GTEST_LIBRARIES} pthread)

运行这里的测试到底是什么？它是我程序的 main() 文件吗？按照我的程序应该怎么替换呢？目前，我在使用 make:

时出现此错误

/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
CMakeFiles/runTests.dir/build.make:95: recipe for target 'runTests' failed
make[2]: *** [runTests] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/runTests.dir/all' failed
make[1]: *** [CMakeFiles/runTests.dir/all] Error 2
Makefile:83: recipe for target 'all

main.cpp：（我也尝试将这部分移动到 tests.cpp 文件的末尾，但仍然没有用）

#include <iostream>
#include "Player.h"
#include "gtest/gtest.h"

using namespace std;

int main(int argc, char **argv) 
{
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
}

Player.h

#ifndef PLAYER_H
#define PLAYER_H

#include <iostream>  
using namespace std;

class Player
{

    int inventory;

public:
    Player();
    int decreaseInventory(int numOfBeers);
    void setInventory(int newInventory);
    int getBackOrder();
    int getCost();
    int getInventory();

    bool operator ==(Player& p);
};

Player::Player()
{
    cout << " Default Player Constructor\n";
    inventory = 12;
    backorder = 0;
    cost = 0;
    orderDelay = 0;
    shipmentDeplay = 0;
}

void Player::setInventory(int newInventory)
{
    inventory = newInventory;
}

int Player::decreaseInventory(int numOfBeers)
{
    inventory = inventory - numOfBeers;
}

int Player::getInventory()
{
    return inventory;
}


#endif

tests.cpp

#include "gtest/gtest.h"
#include "Player.h"

TEST(playerTest, decreaseInventoryTest ) {

    Player p;
    int curr_inv = p.getInventory();
    EXPECT_EQ(curr_inv-3, p.decreaseInventory(3));

}

我怎样才能运行我的测试？

Answer 1

what exactly is runTests here? Is it my program's main() file? How should I replace it according to my program?

runTests 是您要构建的可执行文件的名称。就像任何可执行文件一样，它需要一个 main，并且有两个选项：1) 自己编写或 2) 使用 gtest 提供的那个。如果您想使用选项 1，请将 main.cpp 添加到 add_executable 行。

add_executable(runTests tests.cpp main.cpp)

我认为更好的选择是使用 GTest 提供的 main，因为它为您提供了一些命令行参数。您可以通过将其添加到 target_link_libraries 行来使用它。

target_link_libraries(runTests ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread)

Answer 2

查看官方指南https://google.github.io/googletest/quickstart-cmake.html

FetchContent_Declare(...)

target_link_libraries(
  runTests
  gtest_main
)

CMake 用于 Google 测试

CMake For Google Test

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linux

unit-testing

cmake

googletest