CMake Tutorial4_2 测试支持

一 内容

1. 请先阅读 CMake Tutorial4_1 安装目标 或更前文章。

2. 主要说明 如何使用enable_testing和add_test命令测试。

3. 文件目录

   step4_2
   |- MathFunctions
     |- CMakeLists.txt
     |- MathFunctions.h
     |- mysqrt.cc
   |- CMakeaLists.txt
   |- main.cc 
   |- TutorialConfig.h.in
   

4. 修改CMakeLists.txt

   # 设置CMake最低版本
   cmake_minimum_required(VERSION 3.16)
   
   # 设置项目名称及版本
   project(Tutorial VERSION 1.0)
   
   # 生成可执行文件
   add_executable(Tutorial main.cc)
   
   # 设置选项
   option(USE_MYMATH "use Turotial math" ON)
   
   # 配置文件：拷贝文件到另一位置，并且修改其内容
   configure_file(TutorialConfig.h.in TutorialConfig.h)
   
   if(USE_MYMATH)
     add_subdirectory(MathFunctions)
     list(APPEND extra_libs MathFunctions)
   endif()
   
   target_link_libraries(Tutorial PUBLIC ${
        
        extra_libs})
   
   # 打印信息
   message("PROJECT_BINARY_DIR=${PROJECT_BINARY_DIR}")
   
   # 增加include路径到目标，否则会无法include生成的TutorialConfig.h
   target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}")
   
   install(TARGETS Tutorial DESTINATION bin)
   install(FILES "${PROJECT_BINARY_DIR}/TutorialConfig.h" DESTINATION include)
   
   # ----add
   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(Usage
     PROPERTIES 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)
   
   # do a bunch of result based tests
   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")
   

• 测试属性PASS_REGULAR_EXPRESSION用来验证输出中是否包含指定字符串。

5. 修改main.cc

   // 使用官方例子
   // A simple program that computes the square root of a number
   #include <cmath>
   #include <iostream>
   #include <string>
   
   #include "TutorialConfig.h"
   
   // should we include the MathFunctions header?
   #ifdef USE_MYMATH
   #  include "MathFunctions.h"
   #endif
   
   int main(int argc, char* argv[])
   {
        
        
     if (argc < 2) {
        
        
       // report version
       std::cout << argv[0] << " Version " << Tutorial_VERSION_MAJOR << "."
                 << Tutorial_VERSION_MINOR << std::endl;
       std::cout << "Usage: " << argv[0] << " number"