Source/core/layout/OverflowModelTest.cpp

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#include "config.h"
#include "core/layout/OverflowModel.h"

#include "platform/geometry/LayoutRect.h"
#include <gtest/gtest.h>

namespace blink {
namespace {

LayoutRect initialLayoutOverflow()
{
    return LayoutRect(10, 10, 80, 80);
}

LayoutRect initialVisualOverflow()
{
    return LayoutRect(0, 0, 100, 100);
}

class OverflowModelTest : public testing::Test {
protected:
    OverflowModelTest() : m_overflow(initialLayoutOverflow(), initialVisualOverflow()) { }
    OverflowModel m_overflow;
};

TEST_F(OverflowModelTest, InitialOverflowRects)
{
    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
}

TEST_F(OverflowModelTest, AddLayoutOverflowOutsideExpandsRect)
{
    m_overflow.addLayoutOverflow(LayoutRect(0, 10, 30, 10));
    EXPECT_EQ(LayoutRect(0, 10, 90, 80), m_overflow.layoutOverflowRect());
}

TEST_F(OverflowModelTest, AddLayoutOverflowInsideDoesNotAffectRect)
{
    m_overflow.addLayoutOverflow(LayoutRect(50, 50, 10, 20));
    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
}

TEST_F(OverflowModelTest, 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(OverflowModelTest, AddLayoutOverflowDoesNotAffectVisualOverflow)
{
    m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
}

TEST_F(OverflowModelTest, AddLayoutOverflowDoesNotAffectContentsVisualOverflow)
{
    m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
}

TEST_F(OverflowModelTest, AddVisualOverflowOutsideExpandsRect)
{
    m_overflow.addVisualOverflow(LayoutRect(150, -50, 10, 10));
    EXPECT_EQ(LayoutRect(0, -50, 160, 150), m_overflow.visualOverflowRect());
}

TEST_F(OverflowModelTest, AddVisualOverflowInsideDoesNotAffectRect)
{
    m_overflow.addVisualOverflow(LayoutRect(0, 10, 90, 90));
    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
}

TEST_F(OverflowModelTest, 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(OverflowModelTest, AddVisualOverflowDoesNotAffectLayoutOverflow)
{
    m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
}

TEST_F(OverflowModelTest, AddVisualOverflowDoesNotAffectContentsVisualOverflow)
{
    m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
}

TEST_F(OverflowModelTest, AddContentsVisualOverflowFirstCall)
{
    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
    EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
}

TEST_F(OverflowModelTest, 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(OverflowModelTest, 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(OverflowModelTest, 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(OverflowModelTest, MoveAffectsLayoutOverflow)
{
    m_overflow.move(500, 100);
    EXPECT_EQ(LayoutRect(510, 110, 80, 80), m_overflow.layoutOverflowRect());
}

TEST_F(OverflowModelTest, MoveAffectsVisualOverflow)
{
    m_overflow.move(500, 100);
    EXPECT_EQ(LayoutRect(500, 100, 100, 100), m_overflow.visualOverflowRect());
}

TEST_F(OverflowModelTest, MoveAffectsContentsVisualOverflow)
{
    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
    m_overflow.move(500, 100);
    EXPECT_EQ(LayoutRect(500, 100, 10, 10), m_overflow.contentsVisualOverflowRect());
}

} // anonymous namespace
} // namespace blink