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      1 /*
      2  * Copyright (c) 2013, Google Inc. All rights reserved.
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      4  * Redistribution and use in source and binary forms, with or without
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     10  *     * Redistributions in binary form must reproduce the above
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     16  * this software without specific prior written permission.
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     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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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/animation/AnimationClock.h"
     33 
     34 #include "wtf/OwnPtr.h"
     35 #include <gtest/gtest.h>
     36 
     37 using namespace WebCore;
     38 
     39 namespace {
     40 
     41 class AnimationAnimationClockTest : public ::testing::Test {
     42 public:
     43     AnimationAnimationClockTest()
     44         : animationClock(mockTimeFunction)
     45     { }
     46 protected:
     47     virtual void SetUp()
     48     {
     49         mockTime = 0;
     50         animationClock.resetTimeForTesting();
     51     }
     52 
     53     static double mockTimeFunction()
     54     {
     55         return mockTime;
     56     }
     57 
     58     static double mockTime;
     59     AnimationClock animationClock;
     60 };
     61 
     62 double AnimationAnimationClockTest::mockTime;
     63 
     64 TEST_F(AnimationAnimationClockTest, TimeIsGreaterThanZeroForUnitTests)
     65 {
     66     AnimationClock clock;
     67     // unit tests outside core/animation shouldn't need to do anything to get
     68     // a non-zero currentTime().
     69     EXPECT_GT(clock.currentTime(), 0);
     70 }
     71 
     72 TEST_F(AnimationAnimationClockTest, TimeDoesNotChange)
     73 {
     74     animationClock.updateTime(100);
     75     EXPECT_EQ(100, animationClock.currentTime());
     76     EXPECT_EQ(100, animationClock.currentTime());
     77 }
     78 
     79 TEST_F(AnimationAnimationClockTest, TimeAdvancesWhenUpdated)
     80 {
     81     animationClock.updateTime(100);
     82     EXPECT_EQ(100, animationClock.currentTime());
     83 
     84     animationClock.updateTime(200);
     85     EXPECT_EQ(200, animationClock.currentTime());
     86 }
     87 
     88 TEST_F(AnimationAnimationClockTest, TimeAdvancesToTaskTime)
     89 {
     90     animationClock.updateTime(100);
     91     EXPECT_EQ(100, animationClock.currentTime());
     92 
     93     mockTime = 150;
     94     AnimationClock::notifyTaskStart();
     95     EXPECT_GE(animationClock.currentTime(), mockTime);
     96 }
     97 
     98 TEST_F(AnimationAnimationClockTest, TimeAdvancesToTaskTimeOnlyWhenRequired)
     99 {
    100     animationClock.updateTime(100);
    101     EXPECT_EQ(100, animationClock.currentTime());
    102 
    103     AnimationClock::notifyTaskStart();
    104     animationClock.updateTime(125);
    105     EXPECT_EQ(125, animationClock.currentTime());
    106 }
    107 
    108 TEST_F(AnimationAnimationClockTest, UpdateTimeIsMonotonic)
    109 {
    110     animationClock.updateTime(100);
    111     EXPECT_EQ(100, animationClock.currentTime());
    112 
    113     // Update can't go backwards.
    114     animationClock.updateTime(50);
    115     EXPECT_EQ(100, animationClock.currentTime());
    116 
    117     mockTime = 50;
    118     AnimationClock::notifyTaskStart();
    119     EXPECT_EQ(100, animationClock.currentTime());
    120 
    121     mockTime = 150;
    122     AnimationClock::notifyTaskStart();
    123     EXPECT_GE(animationClock.currentTime(), mockTime);
    124 
    125     // Update can't go backwards after advance to estimate.
    126     animationClock.updateTime(100);
    127     EXPECT_GE(animationClock.currentTime(), mockTime);
    128 }
    129 
    130 TEST_F(AnimationAnimationClockTest, CurrentTimeUpdatesTask)
    131 {
    132     animationClock.updateTime(100);
    133     EXPECT_EQ(100, animationClock.currentTime());
    134 
    135     mockTime = 100;
    136     AnimationClock::notifyTaskStart();
    137     EXPECT_EQ(100, animationClock.currentTime());
    138 
    139     mockTime = 150;
    140     EXPECT_EQ(100, animationClock.currentTime());
    141 }
    142 
    143 }
    144