third_party/WebKit/Source/platform/animation/UnitBezierTest.cpp

   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 #include "platform/animation/UnitBezier.h"
  27
  28 #include <gtest/gtest.h>
  29
  30 namespace blink {
  31
  32 TEST(UnitBezierTest, BasicUse)
  33 {
  34     UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
  35     EXPECT_EQ(0.875, bezier.solve(0.5, 0.005));
  36 }
  37
  38 TEST(UnitBezierTest, Overshoot)
  39 {
  40     UnitBezier bezier(0.5, 2.0, 0.5, 2.0);
  41     EXPECT_EQ(1.625, bezier.solve(0.5, 0.005));
  42 }
  43
  44 TEST(UnitBezierTest, Undershoot)
  45 {
  46     UnitBezier bezier(0.5, -1.0, 0.5, -1.0);
  47     EXPECT_EQ(-0.625, bezier.solve(0.5, 0.005));
  48 }
  49
  50 TEST(UnitBezierTest, InputAtEdgeOfRange)
  51 {
  52     UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
  53     EXPECT_EQ(0.0, bezier.solve(0.0, 0.005));
  54     EXPECT_EQ(1.0, bezier.solve(1.0, 0.005));
  55 }
  56
  57 TEST(UnitBezierTest, InputOutOfRange)
  58 {
  59     UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
  60     EXPECT_EQ(-2.0, bezier.solve(-1.0, 0.005));
  61     EXPECT_EQ(1.0, bezier.solve(2.0, 0.005));
  62 }
  63
  64 TEST(UnitBezierTest, InputOutOfRangeLargeEpsilon)
  65 {
  66     UnitBezier bezier(0.5, 1.0, 0.5, 1.0);
  67     EXPECT_EQ(-2.0, bezier.solve(-1.0, 1.0));
  68     EXPECT_EQ(1.0, bezier.solve(2.0, 1.0));
  69 }
  70
  71 TEST(UnitBezierTest, InputOutOfRangeCoincidentEndpoints)
  72 {
  73     UnitBezier bezier(0.0, 0.0, 1.0, 1.0);
  74     EXPECT_EQ(-1.0, bezier.solve(-1.0, 0.005));
  75     EXPECT_EQ(2.0, bezier.solve(2.0, 0.005));
  76 }
  77
  78 TEST(UnitBezierTest, InputOutOfRangeVerticalGradient)
  79 {
  80     UnitBezier bezier(0.0, 1.0, 1.0, 0.0);
  81     EXPECT_EQ(0.0, bezier.solve(-1.0, 0.005));
  82     EXPECT_EQ(1.0, bezier.solve(2.0, 0.005));
  83 }
  84
  85 TEST(UnitBezierTest, InputOutOfRangeDistinctEndpoints)
  86 {
  87     UnitBezier bezier(0.1, 0.2, 0.8, 0.8);
  88     EXPECT_EQ(-2.0, bezier.solve(-1.0, 0.005));
  89     EXPECT_EQ(2.0, bezier.solve(2.0, 0.005));
  90 }
  91
  92 } // namespace blink