root/webkit/renderer/compositor_bindings/web_float_animation_curve_unittest.cc

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DEFINITIONS

This source file includes following definitions.
  1. TEST
  2. TEST
  3. TEST
  4. TEST
  5. TEST
  6. TEST
  7. TEST
  8. TEST
  9. TEST
  10. TEST
  11. TEST
  12. TEST
  13. TEST

// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/memory/scoped_ptr.h"
#include "cc/animation/timing_function.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "webkit/renderer/compositor_bindings/web_float_animation_curve_impl.h"

using blink::WebAnimationCurve;
using blink::WebFloatAnimationCurve;
using blink::WebFloatKeyframe;

namespace webkit {
namespace {

// Tests that a float animation with one keyframe works as expected.
TEST(WebFloatAnimationCurveTest, OneFloatKeyframe) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 2),
             WebAnimationCurve::TimingFunctionTypeLinear);
  EXPECT_FLOAT_EQ(2, curve->getValue(-1));
  EXPECT_FLOAT_EQ(2, curve->getValue(0));
  EXPECT_FLOAT_EQ(2, curve->getValue(0.5));
  EXPECT_FLOAT_EQ(2, curve->getValue(1));
  EXPECT_FLOAT_EQ(2, curve->getValue(2));
}

// Tests that a float animation with two keyframes works as expected.
TEST(WebFloatAnimationCurveTest, TwoFloatKeyframe) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 2),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(1, 4),
             WebAnimationCurve::TimingFunctionTypeLinear);
  EXPECT_FLOAT_EQ(2, curve->getValue(-1));
  EXPECT_FLOAT_EQ(2, curve->getValue(0));
  EXPECT_FLOAT_EQ(3, curve->getValue(0.5));
  EXPECT_FLOAT_EQ(4, curve->getValue(1));
  EXPECT_FLOAT_EQ(4, curve->getValue(2));
}

// Tests that a float animation with three keyframes works as expected.
TEST(WebFloatAnimationCurveTest, ThreeFloatKeyframe) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 2),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(1, 4),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(2, 8),
             WebAnimationCurve::TimingFunctionTypeLinear);
  EXPECT_FLOAT_EQ(2, curve->getValue(-1));
  EXPECT_FLOAT_EQ(2, curve->getValue(0));
  EXPECT_FLOAT_EQ(3, curve->getValue(0.5));
  EXPECT_FLOAT_EQ(4, curve->getValue(1));
  EXPECT_FLOAT_EQ(6, curve->getValue(1.5));
  EXPECT_FLOAT_EQ(8, curve->getValue(2));
  EXPECT_FLOAT_EQ(8, curve->getValue(3));
}

// Tests that a float animation with multiple keys at a given time works sanely.
TEST(WebFloatAnimationCurveTest, RepeatedFloatKeyTimes) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 4),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(1, 4),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(1, 6),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(2, 6),
             WebAnimationCurve::TimingFunctionTypeLinear);

  EXPECT_FLOAT_EQ(4, curve->getValue(-1));
  EXPECT_FLOAT_EQ(4, curve->getValue(0));
  EXPECT_FLOAT_EQ(4, curve->getValue(0.5));

  // There is a discontinuity at 1. Any value between 4 and 6 is valid.
  float value = curve->getValue(1);
  EXPECT_TRUE(value >= 4 && value <= 6);

  EXPECT_FLOAT_EQ(6, curve->getValue(1.5));
  EXPECT_FLOAT_EQ(6, curve->getValue(2));
  EXPECT_FLOAT_EQ(6, curve->getValue(3));
}

// Tests that the keyframes may be added out of order.
TEST(WebFloatAnimationCurveTest, UnsortedKeyframes) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(2, 8),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(0, 2),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(1, 4),
             WebAnimationCurve::TimingFunctionTypeLinear);

  EXPECT_FLOAT_EQ(2, curve->getValue(-1));
  EXPECT_FLOAT_EQ(2, curve->getValue(0));
  EXPECT_FLOAT_EQ(3, curve->getValue(0.5));
  EXPECT_FLOAT_EQ(4, curve->getValue(1));
  EXPECT_FLOAT_EQ(6, curve->getValue(1.5));
  EXPECT_FLOAT_EQ(8, curve->getValue(2));
  EXPECT_FLOAT_EQ(8, curve->getValue(3));
}

// Tests that a cubic bezier timing function works as expected.
TEST(WebFloatAnimationCurveTest, CubicBezierTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 0), 0.25, 0, 0.75, 1);
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  EXPECT_FLOAT_EQ(0, curve->getValue(0));
  EXPECT_LT(0, curve->getValue(0.25));
  EXPECT_GT(0.25, curve->getValue(0.25));
  EXPECT_NEAR(curve->getValue(0.5), 0.5, 0.00015);
  EXPECT_LT(0.75, curve->getValue(0.75));
  EXPECT_GT(1, curve->getValue(0.75));
  EXPECT_FLOAT_EQ(1, curve->getValue(1));
}

// Tests that an ease timing function works as expected.
TEST(WebFloatAnimationCurveTest, EaseTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 0), WebAnimationCurve::TimingFunctionTypeEase);
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  scoped_ptr<cc::TimingFunction> timing_function(
      cc::EaseTimingFunction::Create());
  for (int i = 0; i <= 4; ++i) {
    const double time = i * 0.25;
    EXPECT_FLOAT_EQ(timing_function->GetValue(time), curve->getValue(time));
  }
}

// Tests using a linear timing function.
TEST(WebFloatAnimationCurveTest, LinearTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 0),
             WebAnimationCurve::TimingFunctionTypeLinear);
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  for (int i = 0; i <= 4; ++i) {
    const double time = i * 0.25;
    EXPECT_FLOAT_EQ(time, curve->getValue(time));
  }
}

// Tests that an ease in timing function works as expected.
TEST(WebFloatAnimationCurveTest, EaseInTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 0),
             WebAnimationCurve::TimingFunctionTypeEaseIn);
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  scoped_ptr<cc::TimingFunction> timing_function(
      cc::EaseInTimingFunction::Create());
  for (int i = 0; i <= 4; ++i) {
    const double time = i * 0.25;
    EXPECT_FLOAT_EQ(timing_function->GetValue(time), curve->getValue(time));
  }
}

// Tests that an ease in timing function works as expected.
TEST(WebFloatAnimationCurveTest, EaseOutTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 0),
             WebAnimationCurve::TimingFunctionTypeEaseOut);
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  scoped_ptr<cc::TimingFunction> timing_function(
      cc::EaseOutTimingFunction::Create());
  for (int i = 0; i <= 4; ++i) {
    const double time = i * 0.25;
    EXPECT_FLOAT_EQ(timing_function->GetValue(time), curve->getValue(time));
  }
}

// Tests that an ease in timing function works as expected.
TEST(WebFloatAnimationCurveTest, EaseInOutTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 0),
             WebAnimationCurve::TimingFunctionTypeEaseInOut);
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  scoped_ptr<cc::TimingFunction> timing_function(
      cc::EaseInOutTimingFunction::Create());
  for (int i = 0; i <= 4; ++i) {
    const double time = i * 0.25;
    EXPECT_FLOAT_EQ(timing_function->GetValue(time), curve->getValue(time));
  }
}

// Tests that an ease in timing function works as expected.
TEST(WebFloatAnimationCurveTest, CustomBezierTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  double x1 = 0.3;
  double y1 = 0.2;
  double x2 = 0.8;
  double y2 = 0.7;
  curve->add(WebFloatKeyframe(0, 0), x1, y1, x2, y2);
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  scoped_ptr<cc::TimingFunction> timing_function(
      cc::CubicBezierTimingFunction::Create(x1, y1, x2, y2));
  for (int i = 0; i <= 4; ++i) {
    const double time = i * 0.25;
    EXPECT_FLOAT_EQ(timing_function->GetValue(time), curve->getValue(time));
  }
}

// Tests that the default timing function is indeed ease.
TEST(WebFloatAnimationCurveTest, DefaultTimingFunction) {
  scoped_ptr<WebFloatAnimationCurve> curve(new WebFloatAnimationCurveImpl);
  curve->add(WebFloatKeyframe(0, 0));
  curve->add(WebFloatKeyframe(1, 1),
             WebAnimationCurve::TimingFunctionTypeLinear);

  scoped_ptr<cc::TimingFunction> timing_function(
      cc::EaseTimingFunction::Create());
  for (int i = 0; i <= 4; ++i) {
    const double time = i * 0.25;
    EXPECT_FLOAT_EQ(timing_function->GetValue(time), curve->getValue(time));
  }
}

}  // namespace
}  // namespace webkit

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