将gtest与cmake / ctest一起使用时未找到测试 [英] No tests found when using gtest with cmake/ctest

问题描述

我有一个结构如下的项目：

I have a project with the following structure:

linalg
├── build
├── CMakeLists.txt
├── docs
│   └── Doxyfile
├── include
│   └── linalg
│       └── vector3.hpp
├── src
│   ├── CMakeLists.txt
│   └── linalg
│       └── vector3.cpp
└── test
    ├── CMakeLists.txt
    └── linalg
        └── test_vector3.cpp

文件test_vector3.cpp是一个gtest单元测试文件，它提供了两个简单的测试。顶级CMakeLists.txt只需设置包含内容并添加src和测试子目录：

The file test_vector3.cpp is a gtest unit test file which provides two simple tests. The top level CMakeLists.txt simply sets up the includes and adds the src and test subdirectories:

cmake_minimum_required(VERSION 2.8)

project(linalg)

include_directories(include)
add_subdirectory(src)
add_subdirectory(test)

src / CMakeLists.txt文件将vector3.cpp编译为静态库：

The src/CMakeLists.txt file compiles vector3.cpp into a static library:

cmake_minimum_required(VERSION 2.8)

add_library(linalg linalg/vector3.cpp)

test / CMakeLists.txt文件基于/usr/share/cmake-2.8/Modules/FindGTest.cmake中提供的示例：

The test/CMakeLists.txt file is based on the example provided in /usr/share/cmake-2.8/Modules/FindGTest.cmake:

cmake_minimum_required(VERSION 2.8)

enable_testing()
find_package(GTest REQUIRED)
include_directories(${GTEST_INCLUDE_DIRS})

add_executable(test_vector3 linalg/test_vector3.cpp)
target_link_libraries(test_vector3 linalg ${GTEST_BOTH_LIBRARIES} pthread)

add_test(test_vector3 test_vector3)

然后运行以下命令：

cd build
cmake ..
make

我正确编译了liblinalg.a库以构建/ src，并且我正确编译了test_vector3可执行文件以构建/测试。我可以运行test_vector3可执行文件，并从googletest获得输出，说所有测试都已通过，但是如果我运行 make test ，我什么也不会输出，如果我运行 ctest .. 我收到一条消息：

I get the liblinalg.a library compiled correctly in to build/src and I get the test_vector3 executable compiled correctly in to build/test. I can run the test_vector3 executable and I get the output from googletest saying that all tests have passed, however if I run make test I get no output whatsoever and if I run ctest .. I get a message saying:

Test project /home/ryan/GitHub/linalg/build
No tests were found!!!

我缺少什么吗？还是我只是误解了ctest与gtest一起工作的方式？

Is there something I am missing? Or have I just misunderstood how ctest works with gtest?

推荐答案

问题的症结在于 enable_testing在这种情况下，应从顶级CMakeLists.txt调用。添加 include（CTest） 到顶级CMakeLists.txt应该可以为您解决此问题。

The crux of the problem is that enable_testing should be called from your top-level CMakeLists.txt in this case. Adding include(CTest) to your top-level CMakeLists.txt should fix this for you.

这将允许您删除 enable_testing 调用，因为CTest子模块在内部调用 enable_testing 。

This would allow you to remove the enable_testing call in test/CMakeLists.txt, since the CTest submodule calls enable_testing internally.

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