1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "core/rendering/RenderOverflow.h"
33
34#include "platform/geometry/LayoutRect.h"
35
36#include <gtest/gtest.h>
37
38using namespace blink;
39
40namespace blink {
41
42// FIXME: Move this somewhere more generic.
43void PrintTo(const LayoutRect& rect, std::ostream* os)
44{
45    *os << "LayoutRect("
46        << rect.x().toFloat() << ", "
47        << rect.y().toFloat() << ", "
48        << rect.width().toFloat() << ", "
49        << rect.height().toFloat() << ")";
50}
51
52} // namespace blink
53
54namespace {
55
56LayoutRect initialLayoutOverflow()
57{
58    return LayoutRect(10, 10, 80, 80);
59}
60
61LayoutRect initialVisualOverflow()
62{
63    return LayoutRect(0, 0, 100, 100);
64}
65
66class RenderOverflowTest : public testing::Test {
67protected:
68    RenderOverflowTest() : m_overflow(initialLayoutOverflow(), initialVisualOverflow()) { }
69    RenderOverflow m_overflow;
70};
71
72TEST_F(RenderOverflowTest, InitialOverflowRects)
73{
74    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
75    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
76    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
77}
78
79TEST_F(RenderOverflowTest, AddLayoutOverflowOutsideExpandsRect)
80{
81    m_overflow.addLayoutOverflow(LayoutRect(0, 10, 30, 10));
82    EXPECT_EQ(LayoutRect(0, 10, 90, 80), m_overflow.layoutOverflowRect());
83}
84
85TEST_F(RenderOverflowTest, AddLayoutOverflowInsideDoesNotAffectRect)
86{
87    m_overflow.addLayoutOverflow(LayoutRect(50, 50, 10, 20));
88    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
89}
90
91TEST_F(RenderOverflowTest, AddLayoutOverflowEmpty)
92{
93    // This test documents the existing behavior so that we are aware when/if
94    // it changes. It would also be reasonable for addLayoutOverflow to be
95    // a no-op in this situation.
96    m_overflow.addLayoutOverflow(LayoutRect(200, 200, 0, 0));
97    EXPECT_EQ(LayoutRect(10, 10, 190, 190), m_overflow.layoutOverflowRect());
98}
99
100TEST_F(RenderOverflowTest, AddLayoutOverflowDoesNotAffectVisualOverflow)
101{
102    m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
103    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
104}
105
106TEST_F(RenderOverflowTest, AddLayoutOverflowDoesNotAffectContentsVisualOverflow)
107{
108    m_overflow.addLayoutOverflow(LayoutRect(300, 300, 300, 300));
109    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
110}
111
112TEST_F(RenderOverflowTest, AddVisualOverflowOutsideExpandsRect)
113{
114    m_overflow.addVisualOverflow(LayoutRect(150, -50, 10, 10));
115    EXPECT_EQ(LayoutRect(0, -50, 160, 150), m_overflow.visualOverflowRect());
116}
117
118TEST_F(RenderOverflowTest, AddVisualOverflowInsideDoesNotAffectRect)
119{
120    m_overflow.addVisualOverflow(LayoutRect(0, 10, 90, 90));
121    EXPECT_EQ(initialVisualOverflow(), m_overflow.visualOverflowRect());
122}
123
124TEST_F(RenderOverflowTest, AddVisualOverflowEmpty)
125{
126    // This test documents the existing behavior so that we are aware when/if
127    // it changes. It would also be reasonable for addVisualOverflow to be
128    // a no-op in this situation.
129    m_overflow.addVisualOverflow(LayoutRect(200, 200, 0, 0));
130    EXPECT_EQ(LayoutRect(0, 0, 200, 200), m_overflow.visualOverflowRect());
131}
132
133TEST_F(RenderOverflowTest, AddVisualOverflowDoesNotAffectLayoutOverflow)
134{
135    m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
136    EXPECT_EQ(initialLayoutOverflow(), m_overflow.layoutOverflowRect());
137}
138
139TEST_F(RenderOverflowTest, AddVisualOverflowDoesNotAffectContentsVisualOverflow)
140{
141    m_overflow.addVisualOverflow(LayoutRect(300, 300, 300, 300));
142    EXPECT_TRUE(m_overflow.contentsVisualOverflowRect().isEmpty());
143}
144
145TEST_F(RenderOverflowTest, AddContentsVisualOverflowFirstCall)
146{
147    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
148    EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
149}
150
151TEST_F(RenderOverflowTest, AddContentsVisualOverflowUnitesRects)
152{
153    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
154    m_overflow.addContentsVisualOverflow(LayoutRect(80, 80, 10, 10));
155    EXPECT_EQ(LayoutRect(0, 0, 90, 90), m_overflow.contentsVisualOverflowRect());
156}
157
158TEST_F(RenderOverflowTest, AddContentsVisualOverflowRectWithinRect)
159{
160    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
161    m_overflow.addContentsVisualOverflow(LayoutRect(2, 2, 5, 5));
162    EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
163}
164
165TEST_F(RenderOverflowTest, AddContentsVisualOverflowEmpty)
166{
167    // This test documents the existing behavior so that we are aware when/if
168    // it changes. It would also be reasonable for addContentsVisualOverflow to
169    // expand in this situation.
170    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
171    m_overflow.addContentsVisualOverflow(LayoutRect(20, 20, 0, 0));
172    EXPECT_EQ(LayoutRect(0, 0, 10, 10), m_overflow.contentsVisualOverflowRect());
173}
174
175TEST_F(RenderOverflowTest, MoveAffectsLayoutOverflow)
176{
177    m_overflow.move(500, 100);
178    EXPECT_EQ(LayoutRect(510, 110, 80, 80), m_overflow.layoutOverflowRect());
179}
180
181TEST_F(RenderOverflowTest, MoveAffectsVisualOverflow)
182{
183    m_overflow.move(500, 100);
184    EXPECT_EQ(LayoutRect(500, 100, 100, 100), m_overflow.visualOverflowRect());
185}
186
187TEST_F(RenderOverflowTest, MoveAffectsContentsVisualOverflow)
188{
189    m_overflow.addContentsVisualOverflow(LayoutRect(0, 0, 10, 10));
190    m_overflow.move(500, 100);
191    EXPECT_EQ(LayoutRect(500, 100, 10, 10), m_overflow.contentsVisualOverflowRect());
192}
193
194} // namespace
195