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// Copyright 2003, Google Inc.

// All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

//

//     * Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

//     * Neither the name of Google Inc. nor the names of its

// contributors may be used to endorse or promote products derived from

// this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

// Authors: Dan Egnor (egnor@google.com)

// Ported to Windows: Vadim Berman (vadimb@google.com)

#include "gtest/internal/gtest-linked_ptr.h"

#include <stdlib.h>

#include "gtest/gtest.h"

namespace {

using testing::Message;

using testing::internal::linked_ptr;

int num;

Message* history = NULL;

// Class which tracks allocation/deallocation

class A {

 public:

  A(): mynum(num++) { *history << "A" << mynum << " ctor\n"; }

  virtual ~A() { *history << "A" << mynum << " dtor\n"; }

  virtual void Use() { *history << "A" << mynum << " use\n"; }

 protected:

  int mynum;

};

// Subclass

class B : public A {

 public:

  B() { *history << "B" << mynum << " ctor\n"; }

  ~B() { *history << "B" << mynum << " dtor\n"; }

  virtual void Use() { *history << "B" << mynum << " use\n"; }

};

class LinkedPtrTest : public testing::Test {

 public:

  LinkedPtrTest() {

    num = 0;

    history = new Message;

  }

  virtual ~LinkedPtrTest() {

    delete history;

    history = NULL;

  }

};

TEST_F(LinkedPtrTest, GeneralTest) {

  {

    linked_ptr<A> a0, a1, a2;

    // Use explicit function call notation here to suppress self-assign warning.

    a0.operator=(a0);

    a1 = a2;

    ASSERT_EQ(a0.get(), static_cast<A*>(NULL));

    ASSERT_EQ(a1.get(), static_cast<A*>(NULL));

    ASSERT_EQ(a2.get(), static_cast<A*>(NULL));

    ASSERT_TRUE(a0 == NULL);

    ASSERT_TRUE(a1 == NULL);

    ASSERT_TRUE(a2 == NULL);

    {

      linked_ptr<A> a3(new A);

      a0 = a3;

      ASSERT_TRUE(a0 == a3);

      ASSERT_TRUE(a0 != NULL);

      ASSERT_TRUE(a0.get() == a3);

      ASSERT_TRUE(a0 == a3.get());

      linked_ptr<A> a4(a0);

      a1 = a4;

      linked_ptr<A> a5(new A);

      ASSERT_TRUE(a5.get() != a3);

      ASSERT_TRUE(a5 != a3.get());

      a2 = a5;

      linked_ptr<B> b0(new B);

      linked_ptr<A> a6(b0);

      ASSERT_TRUE(b0 == a6);

      ASSERT_TRUE(a6 == b0);

      ASSERT_TRUE(b0 != NULL);

      a5 = b0;

      a5 = b0;

      a3->Use();

      a4->Use();

      a5->Use();

      a6->Use();

      b0->Use();

      (*b0).Use();

      b0.get()->Use();

    }

    a0->Use();

    a1->Use();

    a2->Use();

    a1 = a2;

    a2.reset(new A);

    a0.reset();

    linked_ptr<A> a7;

  }

  ASSERT_STREQ(

    "A0 ctor\n"

    "A1 ctor\n"

    "A2 ctor\n"

    "B2 ctor\n"

    "A0 use\n"

    "A0 use\n"

    "B2 use\n"

    "B2 use\n"

    "B2 use\n"

    "B2 use\n"

    "B2 use\n"

    "B2 dtor\n"

    "A2 dtor\n"

    "A0 use\n"

    "A0 use\n"

    "A1 use\n"

    "A3 ctor\n"

    "A0 dtor\n"

    "A3 dtor\n"

    "A1 dtor\n",

    history->GetString().c_str());

}

}  // Unnamed namespace