cmake - ctest 错误“未找到测试”究竟是什么意思?
问题描述
运行 ctest 时,我收到以下错误消息:
Test project /home/path_to_my_project/build
No tests were found!!!
实际上还不清楚该错误的确切含义。
按照官方文档,我include(CTest)
在根文件夹中调用,然后调用:
if(BUILD_TESTING)
add_subdirectory(test)
endif()
测试文件编译得很好并最终在my_project/build/subprojects/Build/my_project_core/test/testBin
文件夹中。
所以我的猜测是 ctest 没有找到它期望它找到的文件,但是错误消息没有显示任何有用的信息来修复这个错误。
我认为有一些关于 ctest 如何工作以及它期望什么的一般背景将帮助用户面对这个错误。
代码
根:
# CMakeLists.txt
cmake_minimum_required(VERSION 3.12)
project(foo)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set_property(DIRECTORY PROPERTY EP_BASE ${CMAKE_BINARY_DIR}/subprojects)
set(STAGED_INSTALL_PREFIX ${CMAKE_BINARY_DIR}/stage)
include(ExternalProject)
ExternalProject_Add(
${PROJECT_NAME}_core
SOURCE_DIR
${CMAKE_CURRENT_LIST_DIR}/${PROJECT_NAME}_core
CMAKE_ARGS
-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}
-DCMAKE_CXX_EXTENSIONS=${CMAKE_CXX_EXTENSIONS}
-DCMAKE_CXX_STANDARD_REQUIRED=${CMAKE_CXX_STANDARD_REQUIRED}
CMAKE_CACHE_ARGS
-DCMAKE_CXX_FLAGS:STRING=${CMAKE_CXX_FLAGS}
BUILD_ALWAYS
1
INSTALL_COMMAND
""
)
外部项目:
# external/upstream/CMakeLists.txt
add_subdirectory(boost)
Dummy boost external(如果未找到系统版本,则不执行任何操作):
# external/upstream/boost/CMakeLists.txt
find_package(Boost ${Boost_MINIMUM_REQUIRED} QUIET CONFIG COMPONENTS "${BOOST_COMPONENTS_REQUIRED}")
if(Boost_FOUND)
message(STATUS "Found Boost: ${_loc} (version ${Boost_MAJOR_VERSION}.${Boost_MINOR_VERSION}.${Boost_SUBMINOR_VERSION})")
add_library(boost_external INTERFACE)
else()
message(STATUS "Boost ${Boost_MINIMUM_REQUIRED} could not be located, downloading and building Boost 1.72.0 instead.")
endif()
核心项目:
# foo_core/CMakeLists.txt
cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
project("foo" LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
add_library(${PROJECT_NAME} INTERFACE)
# add alias so the project can be used with add_subdirectory
add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
enable_testing()
add_subdirectory(test)
测试:
# foo_core/test/CMakeLists.txt
cmake_minimum_required(VERSION 3.12)
# Include Boost as an imported target
find_package(Boost REQUIRED CONFIG COMPONENTS unit_test_framework)
# Keep test files in a separate source directory called test
file(GLOB TEST_SRCS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} unit_test/*.cpp)
#Run through each source
foreach(testSrc ${TEST_SRCS})
#Extract the filename without an extension (NAME_WE)
get_filename_component(testName ${testSrc} NAME_WE)
#Add compile target
add_executable(${testName} ${testSrc})
#link to Boost libraries AND your targets and dependencies
target_link_libraries(${testName} Boost::unit_test_framework )
#I like to move testing binaries into a testBin directory
set_target_properties(${testName} PROPERTIES
RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/test/testBin)
target_include_directories(
${testName} PRIVATE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>)
#Finally add it to test execution - Notice the WORKING_DIRECTORY and COMMAND
add_test(NAME ${testName}
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/test/testBin
COMMAND ${CMAKE_BINARY_DIR}/test/testBin/${testName} )
endforeach(testSrc)
foo_core/include/foo/bar.h
#ifndef __BAR_H_INCLUDED__
#define __BAR_H_INCLUDED__
template<class T>
T bar(T a, T b){ return a*b;};
#endif
foo_core/test/unit_test/foo_test.cpp
#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MODULE foo_test
#include <boost/test/unit_test.hpp>
namespace utf = boost::unit_test;
#include <foo/bar.h>
BOOST_AUTO_TEST_SUITE( bar_suite )
BOOST_AUTO_TEST_CASE( bar_case )
{
BOOST_CHECK_EQUAL(bar(2,2), 4);
}
BOOST_AUTO_TEST_SUITE_END()
解决方案
添加
ENABLE_TESTING()
在子项目中的 AddTest 之前。您不仅需要在头 Cmake 项目配置中添加此命令,还需要在子项目配置文件中添加此命令。
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