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..c547baeba282187fd48a48b3e1c09cefeadd3bf5
--- /dev/null
+++ b/Source/core/animation/FilterStyleInterpolationTest.cpp
@@ -0,0 +1,55 @@
+// 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 PassRefPtrWillBeRawPtr<CSSFunctionValue> roundTrip(PassRefPtrWillBeRawPtr<CSSValue> value)
+    {
+        CSSValueID functionType;
+        ASSERT(FilterStyleInterpolation::canCreateFrom(*value, *value));
+        OwnPtrWillBeRawPtr<InterpolableValue> interpolableValue = FilterStyleInterpolation::toInterpolableValue(*value, functionType);
+        return FilterStyleInterpolation::fromInterpolableValue(*interpolableValue, functionType);
+    }
+
+    static void testPrimitiveValue(RefPtrWillBeRawPtr<CSSValue> value, CSSValueID functionType, double expected, CSSPrimitiveValue::UnitType unitType)
+    {
+        EXPECT_TRUE(value->isFunctionValue());
+        const CSSFunctionValue& filterValue = toCSSFunctionValue(*value);
+        EXPECT_EQ(functionType, filterValue.functionType());
+        EXPECT_EQ(1U, filterValue.length());
+        EXPECT_TRUE(filterValue.item(0)->isPrimitiveValue());
+        const CSSPrimitiveValue& element = toCSSPrimitiveValue(*filterValue.item(0));
+        EXPECT_EQ(expected, element.getDoubleValue());
+        EXPECT_EQ(unitType, element.primitiveType());
+    }
+};
+
+TEST_F(AnimationFilterStyleInterpolationTest, ZeroTest)
+{
+    RefPtrWillBeRawPtr<CSSFunctionValue> filter;
+
+    filter = CSSFunctionValue::create(CSSValueBlur);
+    filter->append(CSSPrimitiveValue::create(0, CSSPrimitiveValue::CSS_PX));
+    testPrimitiveValue(roundTrip(filter), CSSValueBlur, 0, CSSPrimitiveValue::CSS_PX);
+}
+
+TEST_F(AnimationFilterStyleInterpolationTest, SimpleTest)
+{
+    RefPtrWillBeRawPtr<CSSFunctionValue> filter;
+
+    filter = CSSFunctionValue::create(CSSValueOpacity);
+    filter->append(CSSPrimitiveValue::create(0.5, CSSPrimitiveValue::CSS_NUMBER));
+    testPrimitiveValue(roundTrip(filter), CSSValueOpacity, 0.5, CSSPrimitiveValue::CSS_NUMBER);
+}
+
+}