Add duration estimation data to RenderingStats.

cc/debug/rendering_stats_unittest.cc

+// 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 "base/time/time.h"
+#include "base/values.h"
+#include "cc/debug/rendering_stats.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+namespace {
+
+void CompareDoubleValue(const base::ListValue& list_value,
+                        int index,
+                        double expected_value) {
+  double value;
+  EXPECT_TRUE(list_value.GetDouble(index, &value));
+  EXPECT_EQ(expected_value, value);
+}
+
+TEST(RenderingStatsTest, TimeDeltaListEmpty) {
+  RenderingStats::TimeDeltaList time_delta_list;
+  scoped_ptr<base::ListValue> list_value =
+      time_delta_list.AsListValueInMilliseconds();
+  EXPECT_TRUE(list_value->empty());
+  EXPECT_EQ(0ul, list_value->GetSize());
+}
+
+TEST(RenderingStatsTest, TimeDeltaListNonEmpty) {
+  RenderingStats::TimeDeltaList time_delta_list;
+  time_delta_list.Append(base::TimeDelta::FromMilliseconds(234));
+  time_delta_list.Append(base::TimeDelta::FromMilliseconds(827));
+
+  scoped_ptr<base::ListValue> list_value =
+      time_delta_list.AsListValueInMilliseconds();
+  EXPECT_FALSE(list_value->empty());
+  EXPECT_EQ(2ul, list_value->GetSize());
+
+  CompareDoubleValue(*list_value.get(), 0, 234);
+  CompareDoubleValue(*list_value.get(), 1, 827);
+}
+
+TEST(RenderingStatsTest, TimeDeltaListAdd) {
+  RenderingStats::TimeDeltaList time_delta_list_a;
+  time_delta_list_a.Append(base::TimeDelta::FromMilliseconds(810));
+  time_delta_list_a.Append(base::TimeDelta::FromMilliseconds(32));
+
+  RenderingStats::TimeDeltaList time_delta_list_b;
+  time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(43));
+  time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(938));
+  time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(2));
+
+  time_delta_list_a.Add(time_delta_list_b);
+  scoped_ptr<base::ListValue> list_value =
+      time_delta_list_a.AsListValueInMilliseconds();
+  EXPECT_FALSE(list_value->empty());
+  EXPECT_EQ(5ul, list_value->GetSize());
+
+  CompareDoubleValue(*list_value.get(), 0, 810);
+  CompareDoubleValue(*list_value.get(), 1, 32);
+  CompareDoubleValue(*list_value.get(), 2, 43);
+  CompareDoubleValue(*list_value.get(), 3, 938);
+  CompareDoubleValue(*list_value.get(), 4, 2);
+}
+
+}  // namespace
+}  // namespace cc