WIP: Implement CSS transitions on top of InterpolationTypes instead of AnimatableValues

third_party/WebKit/Source/core/animation/InterpolationEffectTest.cpp

 // Copyright 2014 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 "core/animation/InterpolationEffect.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include <memory>
 
 namespace blink {
 
 namespace {
 
 class SampleInterpolation : public Interpolation {
 public:
-    static PassRefPtr<Interpolation> create(std::unique_ptr<InterpolableValue> start, std::unique_ptr<InterpolableValue> end)
+    static PassRefPtr<Interpolation> create(double start, double end)
     {
-        return adoptRef(new SampleInterpolation(std::move(start), std::move(end)));
+        return adoptRef(new SampleInterpolation(start, end));
     }
 
     PropertyHandle getProperty() const override
     {
         return PropertyHandle(CSSPropertyBackgroundColor);
     }
+
+    const double start;
+    const double end;
+    double current;
+
+protected:
+    void interpolateImpl() final
+    {
+        current = blend(start, end, m_currentFraction);
+    }
+
 private:
-    SampleInterpolation(std::unique_ptr<InterpolableValue> start, std::unique_ptr<InterpolableValue> end)
-        : Interpolation(std::move(start), std::move(end))
-    {
-    }
+    SampleInterpolation(double start, double end)
+        : start(start)
+        , end(end)
+        , current(start)
+    { }
 };
 
 const double duration = 1.0;
 
 } // namespace
 
 class AnimationInterpolationEffectTest : public ::testing::Test {
 protected:
-    InterpolableValue* interpolationValue(Interpolation& interpolation)
+    double getNumber(PassRefPtr<Interpolation> value)
     {
-        return interpolation.getCachedValueForTesting();
-    }
-
-    double getInterpolableNumber(PassRefPtr<Interpolation> value)
-    {
-        return toInterpolableNumber(interpolationValue(*value.get()))->value();
+        return static_cast<SampleInterpolation&>(*value).current;
     }
 };
 
 TEST_F(AnimationInterpolationEffectTest, SingleInterpolation)
 {
     InterpolationEffect interpolationEffect;
-    interpolationEffect.addInterpolation(SampleInterpolation::create(InterpolableNumber::create(0), InterpolableNumber::create(10)),
+    interpolationEffect.addInterpolation(SampleInterpolation::create(0, 10),
         RefPtr<TimingFunction>(), 0, 1, -1, 2);
 
     Vector<RefPtr<Interpolation>> activeInterpolations;
     interpolationEffect.getActiveInterpolations(-2, duration, activeInterpolations);
     EXPECT_EQ(0ul, activeInterpolations.size());
 
     interpolationEffect.getActiveInterpolations(-0.5, duration, activeInterpolations);
     EXPECT_EQ(1ul, activeInterpolations.size());
-    EXPECT_EQ(-5, getInterpolableNumber(activeInterpolations.at(0)));
+    EXPECT_EQ(-5, getNumber(activeInterpolations.at(0)));
 
     interpolationEffect.getActiveInterpolations(0.5, duration, activeInterpolations);
     EXPECT_EQ(1ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(5, getInterpolableNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(5, getNumber(activeInterpolations.at(0)));
 
     interpolationEffect.getActiveInterpolations(1.5, duration, activeInterpolations);
     EXPECT_EQ(1ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(15, getInterpolableNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(15, getNumber(activeInterpolations.at(0)));
 
     interpolationEffect.getActiveInterpolations(3, duration, activeInterpolations);
     EXPECT_EQ(0ul, activeInterpolations.size());
 }
 
 TEST_F(AnimationInterpolationEffectTest, MultipleInterpolations)
 {
     InterpolationEffect interpolationEffect;
-    interpolationEffect.addInterpolation(SampleInterpolation::create(InterpolableNumber::create(10), InterpolableNumber::create(15)),
+    interpolationEffect.addInterpolation(SampleInterpolation::create(10, 15),
         RefPtr<TimingFunction>(), 1, 2, 1, 3);
-    interpolationEffect.addInterpolation(SampleInterpolation::create(InterpolableNumber::create(0), InterpolableNumber::create(1)),
+    interpolationEffect.addInterpolation(SampleInterpolation::create(0, 1),
         LinearTimingFunction::shared(), 0, 1, 0, 1);
-    interpolationEffect.addInterpolation(SampleInterpolation::create(InterpolableNumber::create(1), InterpolableNumber::create(6)),
+    interpolationEffect.addInterpolation(SampleInterpolation::create(1, 6),
         CubicBezierTimingFunction::preset(CubicBezierTimingFunction::EaseType::EASE), 0.5, 1.5, 0.5, 1.5);
 
     Vector<RefPtr<Interpolation>> activeInterpolations;
     interpolationEffect.getActiveInterpolations(-0.5, duration, activeInterpolations);
     EXPECT_EQ(0ul, activeInterpolations.size());
 
     interpolationEffect.getActiveInterpolations(0, duration, activeInterpolations);
     EXPECT_EQ(1ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(0, getInterpolableNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(0, getNumber(activeInterpolations.at(0)));
 
     interpolationEffect.getActiveInterpolations(0.5, duration, activeInterpolations);
     EXPECT_EQ(2ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(0.5f, getInterpolableNumber(activeInterpolations.at(0)));
-    EXPECT_FLOAT_EQ(1, getInterpolableNumber(activeInterpolations.at(1)));
+    EXPECT_FLOAT_EQ(0.5f, getNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(1, getNumber(activeInterpolations.at(1)));
 
     interpolationEffect.getActiveInterpolations(1, duration, activeInterpolations);
     EXPECT_EQ(2ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(10, getInterpolableNumber(activeInterpolations.at(0)));
-    EXPECT_FLOAT_EQ(5.0282884f, getInterpolableNumber(activeInterpolations.at(1)));
+    EXPECT_FLOAT_EQ(10, getNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(5.0282884f, getNumber(activeInterpolations.at(1)));
 
     interpolationEffect.getActiveInterpolations(1, duration * 1000, activeInterpolations);
     EXPECT_EQ(2ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(10, getInterpolableNumber(activeInterpolations.at(0)));
-    EXPECT_FLOAT_EQ(5.0120168f, getInterpolableNumber(activeInterpolations.at(1)));
+    EXPECT_FLOAT_EQ(10, getNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(5.0120168f, getNumber(activeInterpolations.at(1)));
 
     interpolationEffect.getActiveInterpolations(1.5, duration, activeInterpolations);
     EXPECT_EQ(1ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(12.5f, getInterpolableNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(12.5f, getNumber(activeInterpolations.at(0)));
 
     interpolationEffect.getActiveInterpolations(2, duration, activeInterpolations);
     EXPECT_EQ(1ul, activeInterpolations.size());
-    EXPECT_FLOAT_EQ(15, getInterpolableNumber(activeInterpolations.at(0)));
+    EXPECT_FLOAT_EQ(15, getNumber(activeInterpolations.at(0)));
 }
 
 } // namespace blink