Animation: FilterStyleInterpolation for animating filter

Source/core/animation/FilterStyleInterpolationTest.cpp

Index: Source/core/animation/FilterStyleInterpolationTest.cpp
diff --git a/Source/core/animation/FilterStyleInterpolationTest.cpp b/Source/core/animation/FilterStyleInterpolationTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0b858abd2bdfb97ce65d88f9831ff7019f9655bd
--- /dev/null
+++ b/Source/core/animation/FilterStyleInterpolationTest.cpp
@@ -0,0 +1,43 @@
+// Copyright 2015 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 "config.h"
+#include "core/animation/FilterStyleInterpolation.h"
+
+#include "core/css/CSSPrimitiveValue.h"
+
+#include <gtest/gtest.h>
+
+namespace blink {
+
+class AnimationFilterStyleInterpolationTest : public ::testing::Test {
+protected:
+    static void roundTrip(const CSSValue& value)
+    {
+        CSSValueID functionType;
+        ASSERT_TRUE(FilterStyleInterpolation::canCreateFrom(value, value));
+        OwnPtrWillBeRawPtr<InterpolableValue> interpolableValue = FilterStyleInterpolation::toInterpolableValue(value, functionType);
+        RefPtrWillBeRawPtr<CSSFunctionValue> result = FilterStyleInterpolation::fromInterpolableValue(*interpolableValue, functionType);
+        ASSERT_TRUE(value.equals(*result));
+    }
+};
+
+TEST_F(AnimationFilterStyleInterpolationTest, ZeroTest)
+{
+    RefPtrWillBeRawPtr<CSSFunctionValue> filter;
+    filter = CSSFunctionValue::create(CSSValueBlur);
+    filter->append(CSSPrimitiveValue::create(0, CSSPrimitiveValue::CSS_PX));
+    roundTrip(*filter);
+}
+
+TEST_F(AnimationFilterStyleInterpolationTest, SimpleTest)
+{
+    RefPtrWillBeRawPtr<CSSFunctionValue> filter;
+
+    filter = CSSFunctionValue::create(CSSValueOpacity);
+    filter->append(CSSPrimitiveValue::create(0.5, CSSPrimitiveValue::CSS_NUMBER));
+    roundTrip(*filter);
+}
+
+}