Linux下google test搭建

code：https://gitee.com/kacakaca/Test/tree/master/googletest_examples
执行：
cmake -S . -B build
cmake --build build/
执行完上述命令后，在./build/bin下会有可执行文件，执行该文件
文件目录结构如下：

目录文件
其中：

cmake相关文件有两个：./CMakeLists.txt 和./example/src/CMakeLists.txt

CmakeLists.txt

cmake_minimum_required(VERSION 3.14)
project(googletest_example)

set(CMAKE_CXX_STANDARD 11)
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)

include(FetchContent)
FetchContent_Declare(
  googletest
  GIT_REPOSITORY https://github.com/google/googletest.git
  GIT_TAG        release-1.10.0
)

FetchContent_MakeAvailable(googletest)

enable_testing()

include_directories(
  ${PROJECT_SOURCE_DIR}/example/include
)

add_subdirectory(example/src)

add_executable(
  basic_test
  example/test/people_test.cpp
  basic_test.cpp
)

target_link_libraries(
  basic_test
  example
  gtest_main
)

example/CmakeLists.txt

aux_source_directory(. DIR_EXAM_SRCS)
add_library(example ${DIR_EXAM_SRCS})

源文件有：/basic_test.cpp，./example/include/people.hpp，./example/src/people.cpp和example/test/people_test.cpp
将basic_test.cpp和people_test.cpp分开了，这样可以增加其他的测试类

basic_test.cpp

test的起始文件，通过RUN_ALL_TESTS()进行test的一些setup，并且执行链接的所有test，我仅写了最基础的，可以通过继承::testing::EmptyTestEventListener设置一些自己的配置，如：https://github.com/google/googletest/blob/master/googletest/samples/sample9_unittest.cc
```
#include <gtest/gtest.h>
#include <iostream>

GTEST_API_ int main(int argc, char * argv[])
{
        
        
    std::cout << "begin test:" << std::endl;
    ::testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}
```

example/include/people.hpp
需要测试的类的头文件, 只是简单的设置和获得人名

#include <iostream>
#include <string>

class People {
        
        
public:
    People(std::string name);
    ~People();
    std::string getName();
private:
    std::string name_;
};

example/src/people.cpp
需要测试的类的源文件

#include "people.hpp"

People::People(std::string name)
{
        
        
    name_ = name;
}

People::~People()
{
        
        

}

std::string People::getName()
{
        
        
    return name_;
}

example/test/people_test.cpp
测试文件，初始化的名字和得到的名字是否一致

#include "people.hpp"
#include <gtest/gtest.h>

TEST(PeopleTest, Basic) {
        
        
    People a("li");
    std::string name = a.getName();
    EXPECT_EQ("li", name);
}

参考：
google test quick start：https://google.github.io/googletest/quickstart-cmake.html
google test examples： https://google.github.io/googletest/samples.html
cmake help：https://cmake.org/cmake/help/latest/index.html
cmake不同目录：https://blog.csdn.net/ktigerhero3/article/details/70313350

为了不用每个测试类都写CMakeLists.txt：

需要创建测试文件夹(如example文件夹)，并在此文件夹下增加include、src和test文件夹
将example下面的CMakeLists.txt删掉，

并且将主CMakeLists.txt改成如下：

cmake_minimum_required(VERSION 3.14)
project(googletest_example)

set(CMAKE_CXX_STANDARD 11)
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)

include(FetchContent)
FetchContent_Declare(
  googletest
  GIT_REPOSITORY https://github.com/google/googletest.git
  GIT_TAG        release-1.10.0
)

FetchContent_MakeAvailable(googletest)

enable_testing()

file(GLOB_RECURSE TEST_LIST ${CMAKE_CURRENT_SOURCE_DIR}/*/test/*.cpp)

foreach(file ${TEST_LIST})
    # find parent folder of test
    string(REGEX REPLACE "${CMAKE_CURRENT_SOURCE_DIR}/(.*)/test/(.*\.cpp$)" "\\1" name ${file})
    message(STATUS "test-${name}: file: ${file}")
    
    set(TEST_FOLDER ${CMAKE_CURRENT_SOURCE_DIR}/${name})
    include_directories(${TEST_FOLDER}/include)

    add_executable(
      ${name}_test
      ${file}
      basic_test.cpp
    )

    file(GLOB_RECURSE TEST_LIB_SRCS ${TEST_FOLDER}/src/*.cpp)
    add_library(${name}_test_lib ${TEST_LIB_SRCS})
    target_link_libraries(
      ${name}_test
      ${name}_test_lib
      gtest_main
    )

endforeach()

Linux下google test搭建

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