测试驱动开发TDD（二）开源测试框架CppUnit

 class MathTest : public CppUnit::TestFixture {
 protected:
   int m_value1, m_value2;
 public:
   MathTest() {}
  // 初始化函数
   void setUp () {
     m_value1 = 2;
     m_value2 = 3;
   }
   // 测试加法的测试函数
   void testAdd () {
       // 步骤(2),对 fixture 进行操作
     int result = m_value1 + m_value2;
       // 步骤(3),验证结果是否争取
     CPPUNIT_ASSERT( result == 5 );
   }
   // 没有什么清理工作没有定义 tearDown. 
 }

CPPUNIT_ASSERT(condition)   // 确信condition为真
CPPUNIT_ASSERT_MESSAGE(message, condition)  
// 当condition为假时失败, 并打印message
CPPUNIT_FAIL(message)            
// 当前测试失败, 并打印message
CPPUNIT_ASSERT_EQUAL(expected, actual)    
// 确信两者相等
CPPUNIT_ASSERT_EQUAL_MESSAGE(message, expected, actual)  
// 失败的同时打印message
CPPUNIT_ASSERT_DOUBLES_EQUAL(expected, actual, delta)  
// 当expected和actual之间差大于delta时失败

  CppUnit::TextUi::TestRunner   // 文本方式的TestRunner
  CppUnit::QtUi::TestRunner    // QT方式的TestRunner
  CppUnit::MfcUi::TestRunner    // MFC方式的TestRunner

    CppUnit::TextUi::TestRunner runner;
  CppUnit::TestSuite *suite= new CppUnit::TestSuite();
  
  // 添加一个测试用例
  suite->addTest(new CppUnit::TestCaller<MathTest> (
                "testAdd", testAdd));
  
  // 指定运行TestSuite 
  runner.addTest( suite );
  // 开始运行, 自动显示测试进度和测试结果
  runner.run( "", true );    // Run all tests and wait

/// MathTest.h
// A TestFixture subclass.
// Announce: use as your owner risk.
// Author  : liqun (liqun@nsfocus.com)
// Data    : 2003-7-5
#include "cppunit/TestFixture.h"
class MathTest : public CppUnit::TestFixture {
protected:
  int m_value1, m_value2;
  
public:
  MathTest() {}
  
  // 初始化函数
  void setUp ();
  // 清理函数
  void tearDown();
  
  // 测试加法的测试函数
  void testAdd ();
  // 可以添加新的测试函数
};
/// MathTest.cpp
// A TestFixture subclass.
// Announce: use as your owner risk.
// Author  : liqun (liqun@nsfocus.com)
// Data    : 2003-7-5
#include "MathTest.h"
#include "cppunit/TestAssert.h"
void MathTest::setUp()
{
     m_value1 = 2;
     m_value2 = 3;
}
void MathTest::tearDown()
{
}
void MathTest::testAdd()
{
     int result = m_value1 + m_value2;
     CPPUNIT_ASSERT( result == 5 );
}

/// main.cpp
// Main file for cppunit test.
// Announce: use as your owner risk.
// Author  : liqun (liqun@nsfocus.com)
// Data    : 2003-7-5
// Note     : Cannot compile, only for study.  
#include "MathTest.h"
#include "cppunit/ui/text/TestRunner.h"
#include "cppunit/TestCaller.h"
#include "cppunit/TestSuite.h"
int main()
{
  CppUnit::TextUi::TestRunner runner;
  CppUnit::TestSuite *suite= new CppUnit::TestSuite();
  
  // 添加一个测试用例
  suite->addTest(new CppUnit::TestCaller<MathTest> (
                "testAdd", testAdd));
  
  // 指定运行TestSuite 
  runner.addTest( suite );
  // 开始运行, 自动显示测试进度和测试结果
  runner.run( "", true );    // Run all tests and wait
}

/// MathTest.h
// A TestFixture subclass.
// Announce: use as your owner risk.
// Author  : liqun (liqun@nsfocus.com)
// Data    : 2003-7-5
#include "cppunit/extensions/HelperMacros.h"
class MathTest : public CppUnit::TestFixture {
  // 声明一个TestSuite
  CPPUNIT_TEST_SUITE( MathTest );
  // 添加测试用例到TestSuite, 定义新的测试用例需要在这儿声明一下
  CPPUNIT_TEST( testAdd );
  // TestSuite声明完成
  CPPUNIT_TEST_SUITE_END();
  // 其余不变
protected:
  int m_value1, m_value2;
  
public:
  MathTest() {}
  
  // 初始化函数
  void setUp ();
  // 清理函数
  void tearDown();
  
  // 测试加法的测试函数
  void testAdd ();
  // 可以添加新的测试函数
};
/// MathTest.cpp
// A TestFixture subclass.
// Announce: use as your owner risk.
// Author  : liqun (liqun@nsfocus.com)
// Data    : 2003-7-5
#include "MathTest.h"
// 把这个TestSuite注册到名字为"alltest"的TestSuite中, 如果没有定义会自动定义
// 也可以CPPUNIT_TEST_SUITE_REGISTRATION( MathTest );注册到全局的一个未命名的TestSuite中.
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( MathTest, "alltest" );
// 下面不变
void MathTest::setUp()
{
     m_value1 = 2;
     m_value2 = 3;
}
void MathTest::tearDown()
{
}
void MathTest::testAdd()
{
     int result = m_value1 + m_value2;
     CPPUNIT_ASSERT( result == 5 );
}
/// main.cpp
// Main file for cppunit test.
// Announce: use as your owner risk.
// Compile : g++ -lcppunit MathTest.cpp main.cpp
// Run     : ./a.out
// Test    : RedHat 8.0 CppUnit1.8.0
// Author  : liqun ( a litthle modification. liqun@nsfocus.com)
// Data    : 2003-7-5
// 不用再包含所有TestFixture子类的头文件
#include <cppunit/extensions/TestFactoryRegistry.h>
#include <cppunit/ui/text/TestRunner.h>
// 如果不更改TestSuite, 本文件后期不需要更改. 
int main()
{
  CppUnit::TextUi::TestRunner runner;
  
  // 从注册的TestSuite中获取特定的TestSuite, 没有参数获取未命名的TestSuite.
  CppUnit::TestFactoryRegistry &registry = 
      CppUnit::TestFactoryRegistry::getRegistry("alltest");
  // 添加这个TestSuite到TestRunner中
  runner.addTest( registry.makeTest() );
  // 运行测试
  runner.run();
}