我是在window下使用clion来写c++的，最近学习了gtest，中间遇到了一些问题，记录一下。

整体目录

先看一下目录结构

两个测试case，前面就有运行的标志，直接点击就能运行

具体的代码

CMakeLists.txt

cmake_minimum_required(VERSION 3.14)
project(my_project)

# GoogleTest requires at least C++11
set(CMAKE_CXX_STANDARD 11)

include(FetchContent)
FetchContent_Declare(
        googletest
        URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
)
# For Windows: Prevent overriding the parent project's compiler/linker settings
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
FetchContent_MakeAvailable(googletest)


enable_testing()

add_executable(
        gtest_demo
        gtest_demo_1.cc
        sample1.cc
)


target_link_libraries(
        gtest_demo
        gtest_main
)


include(GoogleTest)
gtest_discover_tests(gtest_demo)

sample1.h

#ifndef GOOGLETEST_SAMPLES_SAMPLE1_H_
#define GOOGLETEST_SAMPLES_SAMPLE1_H_

// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
int Factorial(int n);

// Returns true if and only if n is a prime number.
bool IsPrime(int n);

#endif  // GOOGLETEST_SAMPLES_SAMPLE1_H_

sample1.cc

#include "sample1.h"

// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
int Factorial(int n) {
  int result = 1;
  for (int i = 1; i <= n; i++) {
    result *= i;
  }

  return result;
}

// Returns true if and only if n is a prime number.
bool IsPrime(int n) {
  // Trivial case 1: small numbers
  if (n <= 1) return false;

  // Trivial case 2: even numbers
  if (n % 2 == 0) return n == 2;

  // Now, we have that n is odd and n >= 3.

  // Try to divide n by every odd number i, starting from 3
  for (int i = 3; ; i += 2) {
    // We only have to try i up to the square root of n
    if (i > n/i) break;

    // Now, we have i <= n/i < n.
    // If n is divisible by i, n is not prime.
    if (n % i == 0) return false;
  }

  // n has no integer factor in the range (1, n), and thus is prime.
  return true;
}

gtest_demo_1.cc

#include <iostream>
#include <gtest/gtest.h>
#include "sample1.h"

int add(int lhs, int rhs) { return lhs + rhs; }

//int main(int argc, char* argv[]) {
//    std::cout << "start gtest2222 demo \r\n" << std::endl;
//    ::testing::InitGoogleTest(&argc, argv);
//    return RUN_ALL_TESTS();
//}


TEST(FactorialTest, ZeroABC) {
    EXPECT_EQ(2,1+1);
    EXPECT_EQ(5,1+4);
}



TEST(FactorialTest, ZeroABC2) {
    EXPECT_EQ(1, Factorial(0));
}

代码已经看完了，单个测试case也可以跑完了，如果我想整体运行怎么办呢？
去掉gtest_demo_1里面main方法的注释。

命令行里运行

进入项目根目录
mkdir build
cd build
cmake ..
cmake --build .

运行完上面的命令，就能看到项目结构如下：

build文件夹里面有个debug文件，再进去就能看到gtest_demo.exe

使用make命令来构建

大家记住一点在windows下，其实本身并没有make这个命令，直接使用cmake也不会产生makefile文件。
如果我就是想用make命令呢？
第一步，先在C:\Program Files\mingw64\bin里面把mingw32-make.exe复制一份，重命名为make.exe

然后回到项目根目录，删除掉build文件夹里面的所有东西。

cd build
cmake .. -G "Unix Makefiles" 
make -j4

效果如下：