如何通过柯南使用 gtest

Question

我目前正在学习柯南。作为一个实践项目，我想创建一个带有单元测试的库（我很清楚将柯南用于 gtest 并不是最有用的事情，但这只是一个例子）。

我的项目目录：

• 构建
  • 斌
    • array_tests
• 源
  • Array.hpp
• 测试
  • array_tests.cpp
• conanfile.txt
• CMakeLists.txt

我的conanfile.txt

[requires]
gtest/1.10.0

[generators]
cmake

我的 CMakeLists.txt：

cmake_minimum_required(VERSION 3.5)
project(ralib)
enable_testing()

include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup()

add_library(ralib INTERFACE)

add_executable(array_tests tests/array_tests.cpp)
target_link_libraries(array_tests ${CONAN_LIBS})


add_test(NAME array_tests WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/bin COMMAND array_tests)

我的array_tests.cpp：

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

TEST(Array, test){
    std::cout << "g" << std::endl;
    EXPECT_EQ(1, 1);
}

来自build：

./bin/array_tests

执行 array_tests 时出错

munmap_chunk(): invalid pointer
Aborted (core dumped)

来自build：

conan install .. && cmake .. && cmake --build . -- -j8 && ctest

输出：

Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=7
os=Linux
os_build=Linux
[options]
[build_requires]
[env]

conanfile.txt: Installing package
Requirements
    gtest/1.10.0 from 'conan-center' - Cache
Packages
    gtest/1.10.0:4a8c5b4cd3b4d45b83fff85d53160ea02ae5fa2d - Cache

Installing (downloading, building) binaries...
gtest/1.10.0: Already installed!
conanfile.txt: Generator cmake created conanbuildinfo.cmake
conanfile.txt: Generator txt created conanbuildinfo.txt
conanfile.txt: Generated conaninfo.txt
conanfile.txt: Generated graphinfo
-- Conan: Adjusting output directories
-- Conan: Using cmake global configuration
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Current conanbuildinfo.cmake directory: /home/domane/dev/dlr/ravis/ralib/build
-- Conan: Compiler GCC>=5, checking major version 7
-- Conan: Checking correct version: 7
-- Configuring done
-- Generating done
-- Build files have been written to: /home/domane/dev/dlr/ravis/ralib/build
Scanning dependencies of target array_tests
[ 50%] Building CXX object CMakeFiles/array_tests.dir/tests/array_tests.cpp.o
[100%] Linking CXX executable bin/array_tests
[100%] Built target array_tests
Test project /home/domane/dev/dlr/ravis/ralib/build
    Start 1: array_tests
1/1 Test #1: array_tests ......................***Exception: Child aborted  0.02 sec

0% tests passed, 1 tests failed out of 1

Total Test time (real) =   0.02 sec

The following tests FAILED:
          1 - array_tests (Child aborted)
Errors while running CTest

任何提示为什么这不起作用？

我通过 target_link_libraries 添加 gtest_main 没有帮助。

Answer 1

Getting Started 文档中有一个警告：

Important

If you are using GCC compiler >= 5.1, Conan will set the compiler.libcxx to the old ABI for backwards compatibility. You can change this with the following commands:

$ conan profile new default --detect  # Generates default profile detecting GCC and sets old ABI
$ conan profile update settings.compiler.libcxx=libstdc++11 default  #

首次初始化默认配置文件时，您可能也会看到此警告。

默认为 libstdc++，因为它也与旧发行版广泛兼容。您需要将默认值更改为libstdc++11：

$ conan profile update settings.compiler.libcxx=libstdc++11 default

Answer 2

似乎有两种不同的解决方案。

您可以将柯南设置为使用 libstdc++11。

这里也回答了这个问题：GTest installed with Conan: undefined reference

Answer 3

对我来说，即使 gtest conan 包得到 no_main=False ，我也必须手动将 main.cpp 文件添加到我的测试文件夹中以使其工作。

main.cpp 文件的内容：

#include <gtest/gtest.h>

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