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
6 * are met:
7 * 1.  Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *     notice, this list of conditions and the following disclaimer in the
11 *     documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "config.h"
26
27#include "platform/animation/UnitBezier.h"
28
29#include <gtest/gtest.h>
30
31using namespace blink;
32
33namespace {
34
35TEST(UnitBezierTest, BasicUse)
36{
37    UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
38    EXPECT_EQ(0.875, bezier.solve(0.5, 0.005));
39}
40
41TEST(UnitBezierTest, Overshoot)
42{
43    UnitBezier bezier(0.5, 2.0, 0.5, 2.0);
44    EXPECT_EQ(1.625, bezier.solve(0.5, 0.005));
45}
46
47TEST(UnitBezierTest, Undershoot)
48{
49    UnitBezier bezier(0.5, -1.0, 0.5, -1.0);
50    EXPECT_EQ(-0.625, bezier.solve(0.5, 0.005));
51}
52
53TEST(UnitBezierTest, InputAtEdgeOfRange)
54{
55    UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
56    EXPECT_EQ(0.0, bezier.solve(0.0, 0.005));
57    EXPECT_EQ(1.0, bezier.solve(1.0, 0.005));
58}
59
60TEST(UnitBezierTest, InputOutOfRange)
61{
62    UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
63    EXPECT_EQ(-2.0, bezier.solve(-1.0, 0.005));
64    EXPECT_EQ(1.0, bezier.solve(2.0, 0.005));
65}
66
67TEST(UnitBezierTest, InputOutOfRangeLargeEpsilon)
68{
69    UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
70    EXPECT_EQ(-2.0, bezier.solve(-1.0, 1.0));
71    EXPECT_EQ(1.0, bezier.solve(2.0, 1.0));
72}
73
74TEST(UnitBezierTest, InputOutOfRangeCoincidentEndpoints)
75{
76    UnitBezier bezier(0.0, 0.0, 1.0, 1.0);
77    EXPECT_EQ(-1.0, bezier.solve(-1.0, 0.005));
78    EXPECT_EQ(2.0, bezier.solve(2.0, 0.005));
79}
80
81TEST(UnitBezierTest, InputOutOfRangeVerticalGradient)
82{
83    UnitBezier bezier(0.0, 1.0, 1.0, 0.0);
84    EXPECT_EQ(0.0, bezier.solve(-1.0, 0.005));
85    EXPECT_EQ(1.0, bezier.solve(2.0, 0.005));
86}
87
88TEST(UnitBezierTest, InputOutOfRangeDistinctEndpoints)
89{
90    UnitBezier bezier(0.1, 0.2, 0.8, 0.8);
91    EXPECT_EQ(-2.0, bezier.solve(-1.0, 0.005));
92    EXPECT_EQ(2.0, bezier.solve(2.0, 0.005));
93}
94
95} // namespace
96