text: /*
   * Copyright (C) 2013 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.
   */
  
  #include "config.h"
  #include "core/rendering/RenderOverflow.h"
  
  #include "platform/geometry/LayoutRect.h"
  
  #include <gtest/gtest.h>
  
  using namespace WebCore;
  
  namespace WebCore {
  
  // FIXME: Move this somewhere more generic.
  void PrintTo(const LayoutRect& rect, std::ostream* os)
  {
      *os << "LayoutRect("
          << rect.x().toFloat() << ", "
          << rect.y().toFloat() << ", "
          << rect.width().toFloat() << ", "
          << rect.height().toFloat() << ")";
  }
  
  } // namespace WebCore
  
  namespace {
  
  LayoutRect initialLayoutOverflow()
  {
      return LayoutRect(10, 10, 80, 80);
  }
  
  LayoutRect initialVisualOverflow()
  {
      return LayoutRect(0, 0, 100, 100);
  }
  
  class RenderOverflowTest : public testing::Test {
  protected:
      RenderOverflowTest() : m_overflow(initialLayoutOverflow(), initialVisualOverflow()) { }
      RenderOverflow m_overflow;
  };
  
  TEST_F(RenderOverflowTest, InitialOverflowRects)
  {
      EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
      EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
      EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
  }
  
  TEST_F(RenderOverflowTest, AddLayoutOverflowOutsideExpandsRect)
  {
      m_overflow.addLayoutOverflow(LayoutRect(0, 10, 30, 10));
      EXPECT_EQ(LayoutRect(0, 10, 90, 80), m_overflow.layoutOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddLayoutOverflowInsideDoesNotAffectRect)
  {
      m_overflow.addLayoutOverflow(LayoutRect(50, 50, 10, 20));
      EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddLayoutOverflowEmpty)
  {
      // This test documents the existing behavior so that we are aware when/if
      // it changes. It would also be reasonable for addLayoutOverflow to be
      // a no-op in this situation.
      m_overflow.addLayoutOverflow(LayoutRect(200, 200, 0, 0));
      EXPECT_EQ(LayoutRect(10, 10, 190, 190), m_overflow.layoutOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddLayoutOverflowDoesNotAffectVisualOverflow)
  {
      m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
      EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddLayoutOverflowDoesNotAffectContentsVisualOverflow)
  {
      m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
      EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
  }
  
  TEST_F(RenderOverflowTest, AddVisualOverflowOutsideExpandsRect)
  {
      m_overflow.addVisualOverflow(LayoutRect(150, -50, 10, 10));
      EXPECT_EQ(LayoutRect(0, -50, 160, 150), m_overflow.visualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddVisualOverflowInsideDoesNotAffectRect)
  {
      m_overflow.addVisualOverflow(LayoutRect(0, 10, 90, 90));
      EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddVisualOverflowEmpty)
  {
      // This test documents the existing behavior so that we are aware when/if
      // it changes. It would also be reasonable for addVisualOverflow to be
      // a no-op in this situation.
      m_overflow.addVisualOverflow(LayoutRect(200, 200, 0, 0));
      EXPECT_EQ(LayoutRect(0, 0, 200, 200), m_overflow.visualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddVisualOverflowDoesNotAffectLayoutOverflow)
  {
      m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
      EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddVisualOverflowDoesNotAffectContentsVisualOverflow)
  {
      m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
      EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
  }
  
  TEST_F(RenderOverflowTest, AddContentsVisualOverflowFirstCall)
  {
      m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
      EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddContentsVisualOverflowUnitesRects)
  {
      m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
      m_overflow.addContentsVisualOverflow(LayoutRect(80, 80, 10, 10));
      EXPECT_EQ(LayoutRect(0, 0, 90, 90), m_overflow.contentsVisualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddContentsVisualOverflowRectWithinRect)
  {
      m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
      m_overflow.addContentsVisualOverflow(LayoutRect(2, 2, 5, 5));
      EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, AddContentsVisualOverflowEmpty)
  {
      // This test documents the existing behavior so that we are aware when/if
      // it changes. It would also be reasonable for addContentsVisualOverflow to
      // expand in this situation.
      m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
      m_overflow.addContentsVisualOverflow(LayoutRect(20, 20, 0, 0));
      EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, MoveAffectsLayoutOverflow)
  {
      m_overflow.move(500, 100);
      EXPECT_EQ(LayoutRect(510, 110, 80, 80), m_overflow.layoutOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, MoveAffectsVisualOverflow)
  {
      m_overflow.move(500, 100);
      EXPECT_EQ(LayoutRect(500, 100, 100, 100), m_overflow.visualOverflowRect());
  }
  
  TEST_F(RenderOverflowTest, MoveAffectsContentsVisualOverflow)
  {
      m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
      m_overflow.move(500, 100);
      EXPECT_EQ(LayoutRect(500, 100, 10, 10), m_overflow.contentsVisualOverflowRect());
  }
  
  } // namespace
  