// 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 <string>

#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 {

static std::string ToString(const RenderingStats::TimeDeltaList& list) {
  scoped_refptr<base::debug::TracedValue> value =
      new base::debug::TracedValue();
  value->BeginArray("list_value");
  list.AddToTracedValue(value.get());
  value->EndArray();
  return value->ToString();
}

TEST(RenderingStatsTest, TimeDeltaListEmpty) {
  RenderingStats::TimeDeltaList time_delta_list;
  EXPECT_EQ("{\"list_value\":[]}", ToString(time_delta_list));
}

TEST(RenderingStatsTest, TimeDeltaListNonEmpty) {
  RenderingStats::TimeDeltaList time_delta_list;
  time_delta_list.Append(base::TimeDelta::FromMilliseconds(234));
  time_delta_list.Append(base::TimeDelta::FromMilliseconds(827));

  EXPECT_EQ("{\"list_value\":[234.0,827.0]}", ToString(time_delta_list));
}

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);
  EXPECT_EQ("{\"list_value\":[810.0,32.0,43.0,938.0,2.0]}",
            ToString(time_delta_list_a));
}

}  // namespace
}  // namespace cc