1. 测试支持

cmake_minimum_required(VERSION 3.15)# set the project name and version
project(Tutorial VERSION 1.0)# specify the C++ standard
add_library(tutorial_compiler_flags INTERFACE)
target_compile_features(tutorial_compiler_flags INTERFACE cxx_std_11)# add compiler warning flags just when building this project via
# the BUILD_INTERFACE genex
set(gcc_like_cxx "$<COMPILE_LANG_AND_ID:CXX,ARMClang,AppleClang,Clang,GNU,LCC>")
set(msvc_cxx "$<COMPILE_LANG_AND_ID:CXX,MSVC>")
target_compile_options(tutorial_compiler_flags INTERFACE"$<${gcc_like_cxx}:$<BUILD_INTERFACE:-Wall;-Wextra;-Wshadow;-Wformat=2;-Wunused>>""$<${msvc_cxx}:$<BUILD_INTERFACE:-W3>>"
)# configure a header file to pass some of the CMake settings
# to the source code
configure_file(TutorialConfig.h.in TutorialConfig.h)# add the MathFunctions library
add_subdirectory(MathFunctions)# add the executable
add_executable(Tutorial tutorial.cxx)target_link_libraries(Tutorial PUBLIC MathFunctions tutorial_compiler_flags)# add the binary tree to the search path for include files
# so that we will find TutorialConfig.h
target_include_directories(Tutorial PUBLIC"${PROJECT_BINARY_DIR}")# add the install targets
install(TARGETS Tutorial DESTINATION bin)
install(FILES "${PROJECT_BINARY_DIR}/TutorialConfig.h"DESTINATION include)# TODO 1: Replace enable_testing() with include(CTest)
# enable testing
include(CTest)
#enable_testing()# does the application run
add_test(NAME Runs COMMAND Tutorial 25)# does the usage message work?
add_test(NAME Usage COMMAND Tutorial)
set_tests_properties(UsagePROPERTIES PASS_REGULAR_EXPRESSION "Usage:.*number")# define a function to simplify adding tests
function(do_test target arg result)add_test(NAME Comp${arg} COMMAND ${target} ${arg})set_tests_properties(Comp${arg}PROPERTIES PASS_REGULAR_EXPRESSION ${result})
endfunction()
do_test(Tutorial 4 "4 is 2")
do_test(Tutorial 9 "9 is 3")
do_test(Tutorial 5 "5 is 2.236")
do_test(Tutorial 7 "7 is 2.645")
do_test(Tutorial 25 "25 is 5")
do_test(Tutorial -25 "-25 is (-nan|nan|0)")
do_test(Tutorial 0.0001 "0.0001 is 0.01")