七步入门CMake之第三步（安装和测试）

这一步是添加安装规格和对测试的支持，添加之后通过执行

cmake .

make install

就可完成构建和安装

执行

cmake .

makt test

就可以完成构建和测试

首先对库文件夹下的CMakeLists.txt文件添加语句：

install (TARGETS MathFunctions DESTINATION bin)
install (FILES MathFunctions.h DESTINATION include)
该语句即可指导将生成的库文件和相应的头文件拷贝到bin目录和include目录
类似的，在主程序文件夹下的CMakeLists.txt文件添加如下语句：

install (TARGETS Tutorial DESTINATION bin)
install (FILES "${PROJECT_BINARY_DIR}/TutorialConfig.h"
DESTINATION include)
添加以上语句即可支持程序的安装。
下面是添加测试
只需在主程序的CMakeLists.txt文件的后面添加即可

# 测试程序是否正常运行
add_test (TutorialRuns Tutorial 25)

# 测试25开方是否为5
add_test (TutorialComp25 Tutorial 25)

set_tests_properties (TutorialComp25
PROPERTIES PASS_REGULAR_EXPRESSION "25 is 5")

# 测试对负数的处理是否正确
add_test (TutorialNegative Tutorial -25)
set_tests_properties (TutorialNegative
PROPERTIES PASS_REGULAR_EXPRESSION "-25 is 0")

# 测试是否支持小数
add_test (TutorialSmall Tutorial 0.0001)
set_tests_properties (TutorialSmall
PROPERTIES PASS_REGULAR_EXPRESSION "0.0001 is 0.01")

# 测试使用消息是否正常工作
add_test (TutorialUsage Tutorial)
set_tests_properties (TutorialUsage
PROPERTIES
PASS_REGULAR_EXPRESSION "Usage:.*number")

确实非常方便。

PROPERTIES PASS_REGULAR_EXPRESSION 用来检查输出的字符串里是否有特定字符

如果需要测试的项目特别多，则可以利用下面的测试语句：

#define a macro to simplify adding tests, then use it
macro (do_test arg result)
add_test (TutorialComp${arg} Tutorial ${arg})
set_tests_properties (TutorialComp${arg}
PROPERTIES PASS_REGULAR_EXPRESSION ${result})
endmacro (do_test)

# do a bunch of result based tests
do_test (25 "25 is 5")
do_test (-25 "-25 is 0")

语句更加精炼