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SharedPtrTest.cpp

//
// SharedPtrTest.cpp
//
// $Id: //poco/1.2/Foundation/testsuite/src/SharedPtrTest.cpp#2 $
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "SharedPtrTest.h"
#include "CppUnit/TestCaller.h"
#include "CppUnit/TestSuite.h"
#include "Poco/SharedPtr.h"
#include "Poco/Exception.h"


using Poco::SharedPtr;
using Poco::NullPointerException;


namespace
{
      class TestObject
      {
      public:
            TestObject(const std::string& data): _data(data)
            {
                  ++_count;
            }
            
            virtual ~TestObject()
            {
                  --_count;
            }
            
            const std::string& data()
            {
                  return _data;
            }
            
            static int count()
            {
                  return _count;
            }
            
      private:
            std::string _data;
            static int _count;
      };
      
      int TestObject::_count = 0;

      class DerivedObject: public TestObject
      {
      public:
            DerivedObject(const std::string& s, int i): TestObject(s), _number(i)
            {
            }

            int number() const
            {
                  return _number;
            }
      private:
            int _number;
      };
}


SharedPtrTest::SharedPtrTest(const std::string& name): CppUnit::TestCase(name)
{
}


SharedPtrTest::~SharedPtrTest()
{
}


void SharedPtrTest::testSharedPtr()
{
      SharedPtr<TestObject> ptr1;
      assertNull(ptr1.get());
      TestObject* pTO1 = new TestObject("one");
      TestObject* pTO2 = new TestObject("two");
      if (pTO2 < pTO1)
      {
            TestObject* pTmp = pTO1;
            pTO1 = pTO2;
            pTO2 = pTmp;
      }
      assert (pTO1 < pTO2);
      ptr1 = pTO1;
      SharedPtr<TestObject> ptr2 = pTO2;
      SharedPtr<TestObject> ptr3 = ptr1;
      SharedPtr<TestObject> ptr4;
      assert (ptr1.get() == pTO1);
      assert (ptr1 == pTO1);
      assert (ptr2.get() == pTO2);
      assert (ptr2 == pTO2);
      assert (ptr3.get() == pTO1);
      assert (ptr3 == pTO1);
      
      assert (ptr1 == pTO1);
      assert (ptr1 != pTO2);
      assert (ptr1 < pTO2);
      assert (ptr1 <= pTO2);
      assert (ptr2 > pTO1);
      assert (ptr2 >= pTO1);
      
      assert (ptr1 == ptr3);
      assert (ptr1 != ptr2);
      assert (ptr1 < ptr2);
      assert (ptr1 <= ptr2);
      assert (ptr2 > ptr1);
      assert (ptr2 >= ptr1);
      
      ptr1.swap(ptr2);
      assert (ptr2 < ptr1);
      ptr2.swap(ptr1);

      assert (ptr1->data() == "one" && ptr2->data() == "two" || ptr1->data() == "two" && ptr2->data() == "one");
      
      try
      {
            assert (ptr4->data() == "four");
            fail ("must throw NullPointerException");
      }
      catch (NullPointerException&)
      {
      }
      
      assert (!(ptr4 == ptr1));
      assert (!(ptr4 == ptr2));
      assert (ptr4 != ptr1);
      assert (ptr4 != ptr2);
      
      ptr4 = ptr2;
      assert (ptr4 == ptr2);
      assert (!(ptr4 != ptr2));
      
      assert (TestObject::count() == 2);
      ptr1 = 0;
      ptr2 = 0;
      ptr3 = 0;
      ptr4 = 0;
      assert (TestObject::count() == 0);
      
      {
            SharedPtr<TestObject> ptr = new TestObject("");
            assert (TestObject::count() == 1);
      }
      assert (TestObject::count() == 0);
}


void SharedPtrTest::testImplicitCast()
{
      {
            // null assign test
            SharedPtr<DerivedObject> ptr2;
            assertNull(ptr2.get());
            SharedPtr<TestObject> ptr1 = ptr2;
      }
      {
            SharedPtr<DerivedObject> ptr2(new DerivedObject("test", 666));
            assert (TestObject::count() == 1);
            SharedPtr<TestObject> ptr1 = ptr2;
            assert (TestObject::count() == 1);
      }
      assert (TestObject::count() == 0);
      SharedPtr<TestObject> ptr1 = new DerivedObject("test", 666);
      assert (TestObject::count() == 1);
      ptr1 = 0;
      assert (TestObject::count() == 0);
}

void SharedPtrTest::testExplicitCast()
{
      SharedPtr<TestObject> ptr1 = new DerivedObject("test", 666);
      SharedPtr<DerivedObject> ptr2 = ptr1.cast<DerivedObject>();
      assert (ptr2.get() != 0);

      // cast the other way round must fail
      ptr1 = new TestObject("test");
      assert (TestObject::count() == 2);
      ptr2 = ptr1.cast<DerivedObject>();
      assert (TestObject::count() == 1);
      assert (ptr2.get() == 0);
}

void SharedPtrTest::setUp()
{
}


void SharedPtrTest::tearDown()
{
}


CppUnit::Test* SharedPtrTest::suite()
{
      CppUnit::TestSuite* pSuite = new CppUnit::TestSuite("SharedPtrTest");

      CppUnit_addTest(pSuite, SharedPtrTest, testSharedPtr);
      CppUnit_addTest(pSuite, SharedPtrTest, testImplicitCast);
      CppUnit_addTest(pSuite, SharedPtrTest, testExplicitCast);

      return pSuite;
}

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