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

third_party/WebKit/Source/core/animation/InterpolableValueTest.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/InterpolableValue.h"
 
 #include "core/animation/Interpolation.h"
 #include "core/animation/PropertyHandle.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)
-    {
-        return adoptRef(new SampleInterpolation(std::move(start), std::move(end)));
-    }
-
-    PropertyHandle getProperty() const override
-    {
-        return PropertyHandle(CSSPropertyBackgroundColor);
-    }
-private:
-    SampleInterpolation(std::unique_ptr<InterpolableValue> start, std::unique_ptr<InterpolableValue> end)
-        : Interpolation(std::move(start), std::move(end))
-    {
-    }
-};
-
-} // namespace
-
 class AnimationInterpolableValueTest : public ::testing::Test {
 protected:
-    InterpolableValue* interpolationValue(Interpolation& interpolation)
+    std::unique_ptr<InterpolableValue> interpolate(std::unique_ptr<InterpolableValue> a, std::unique_ptr<InterpolableValue> b, double progress)
     {
-        return interpolation.getCachedValueForTesting();
+        std::unique_ptr<InterpolableValue> result = a->clone();
+        a->interpolate(*b, progress, *result);
+        return result;
     }
 
     double interpolateNumbers(double a, double b, double progress)
     {
-        RefPtr<Interpolation> i = SampleInterpolation::create(InterpolableNumber::create(a), InterpolableNumber::create(b));
-        i->interpolate(0, progress);
-        return toInterpolableNumber(interpolationValue(*i.get()))->value();
+        return toInterpolableNumber(*interpolate(InterpolableNumber::create(a), InterpolableNumber::create(b), progress)).value();
     }
 
     bool interpolateBools(bool a, bool b, double progress)
     {
-        RefPtr<Interpolation> i = SampleInterpolation::create(InterpolableBool::create(a), InterpolableBool::create(b));
-        i->interpolate(0, progress);
-        return toInterpolableBool(interpolationValue(*i.get()))->value();
+        return toInterpolableBool(*interpolate(InterpolableBool::create(a), InterpolableBool::create(b), progress)).value();
     }
 
     void scaleAndAdd(InterpolableValue& base, double scale, const InterpolableValue& add)
     {
         base.scaleAndAdd(scale, add);
     }
-
-    PassRefPtr<Interpolation> interpolateLists(std::unique_ptr<InterpolableList> listA, std::unique_ptr<InterpolableList> listB, double progress)
-    {
-        RefPtr<Interpolation> i = SampleInterpolation::create(std::move(listA), std::move(listB));
-        i->interpolate(0, progress);
-        return i;
-    }
 };
 
 TEST_F(AnimationInterpolableValueTest, InterpolateNumbers)
 {
     EXPECT_FLOAT_EQ(126, interpolateNumbers(42, 0, -2));
     EXPECT_FLOAT_EQ(42, interpolateNumbers(42, 0, 0));
     EXPECT_FLOAT_EQ(29.4f, interpolateNumbers(42, 0, 0.3));
     EXPECT_FLOAT_EQ(21, interpolateNumbers(42, 0, 0.5));
     EXPECT_FLOAT_EQ(0, interpolateNumbers(42, 0, 1));
     EXPECT_FLOAT_EQ(-21, interpolateNumbers(42, 0, 1.5));
@@ skipping 14 matching lines @@
     std::unique_ptr<InterpolableList> listA = InterpolableList::create(3);
     listA->set(0, InterpolableNumber::create(0));
     listA->set(1, InterpolableNumber::create(42));
     listA->set(2, InterpolableNumber::create(20.5));
 
     std::unique_ptr<InterpolableList> listB = InterpolableList::create(3);
     listB->set(0, InterpolableNumber::create(100));
     listB->set(1, InterpolableNumber::create(-200));
     listB->set(2, InterpolableNumber::create(300));
 
-    RefPtr<Interpolation> i = interpolateLists(std::move(listA), std::move(listB), 0.3);
-    InterpolableList* outList = toInterpolableList(interpolationValue(*i.get()));
-    EXPECT_FLOAT_EQ(30, toInterpolableNumber(outList->get(0))->value());
-    EXPECT_FLOAT_EQ(-30.6f, toInterpolableNumber(outList->get(1))->value());
-    EXPECT_FLOAT_EQ(104.35f, toInterpolableNumber(outList->get(2))->value());
+    std::unique_ptr<InterpolableValue> out = interpolate(std::move(listA), std::move(listB), 0.3);
+    const InterpolableList& outList = toInterpolableList(*out);
+    EXPECT_FLOAT_EQ(30, toInterpolableNumber(outList.get(0))->value());
+    EXPECT_FLOAT_EQ(-30.6f, toInterpolableNumber(outList.get(1))->value());
+    EXPECT_FLOAT_EQ(104.35f, toInterpolableNumber(outList.get(2))->value());
 }
 
 TEST_F(AnimationInterpolableValueTest, NestedList)
 {
     std::unique_ptr<InterpolableList> listA = InterpolableList::create(3);
     listA->set(0, InterpolableNumber::create(0));
     std::unique_ptr<InterpolableList> subListA = InterpolableList::create(1);
     subListA->set(0, InterpolableNumber::create(100));
     listA->set(1, std::move(subListA));
     listA->set(2, InterpolableBool::create(false));
 
     std::unique_ptr<InterpolableList> listB = InterpolableList::create(3);
     listB->set(0, InterpolableNumber::create(100));
     std::unique_ptr<InterpolableList> subListB = InterpolableList::create(1);
     subListB->set(0, InterpolableNumber::create(50));
     listB->set(1, std::move(subListB));
     listB->set(2, InterpolableBool::create(true));
 
-    RefPtr<Interpolation> i = interpolateLists(std::move(listA), std::move(listB), 0.5);
-    InterpolableList* outList = toInterpolableList(interpolationValue(*i.get()));
-    EXPECT_FLOAT_EQ(50, toInterpolableNumber(outList->get(0))->value());
-    EXPECT_FLOAT_EQ(75, toInterpolableNumber(toInterpolableList(outList->get(1))->get(0))->value());
-    EXPECT_TRUE(toInterpolableBool(outList->get(2))->value());
+    std::unique_ptr<InterpolableValue> out = interpolate(std::move(listA), std::move(listB), 0.5);
+    const InterpolableList& outList = toInterpolableList(*out);
+    EXPECT_FLOAT_EQ(50, toInterpolableNumber(outList.get(0))->value());
+    EXPECT_FLOAT_EQ(75, toInterpolableNumber(toInterpolableList(outList.get(1))->get(0))->value());
+    EXPECT_TRUE(toInterpolableBool(outList.get(2))->value());
 }
 
 TEST_F(AnimationInterpolableValueTest, ScaleAndAddNumbers)
 {
     std::unique_ptr<InterpolableNumber> base = InterpolableNumber::create(10);
     scaleAndAdd(*base, 2, *InterpolableNumber::create(1));
     EXPECT_FLOAT_EQ(21, base->value());
 
     base = InterpolableNumber::create(10);
     scaleAndAdd(*base, 0, *InterpolableNumber::create(5));
@@ skipping 14 matching lines @@
     addList->set(0, InterpolableNumber::create(1));
     addList->set(1, InterpolableNumber::create(2));
     addList->set(2, InterpolableNumber::create(3));
     scaleAndAdd(*baseList, 2, *addList);
     EXPECT_FLOAT_EQ(11, toInterpolableNumber(baseList->get(0))->value());
     EXPECT_FLOAT_EQ(22, toInterpolableNumber(baseList->get(1))->value());
     EXPECT_FLOAT_EQ(33, toInterpolableNumber(baseList->get(2))->value());
 }
 
 } // namespace blink