Cast logging: Additional stats for getStats() API.

media/cast/logging/stats_event_subscriber_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/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/rand_util.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "base/time/tick_clock.h"
 #include "media/cast/cast_environment.h"
@@ skipping 113 matching lines @@
 
   it = stats_map.find(StatsEventSubscriber::NUM_FRAMES_CAPTURED);
   ASSERT_TRUE(it != stats_map.end());
 
   EXPECT_DOUBLE_EQ(it->second, static_cast<double>(num_frames));
 
   it = stats_map.find(StatsEventSubscriber::NUM_FRAMES_DROPPED_BY_ENCODER);
   ASSERT_TRUE(it != stats_map.end());
 
   EXPECT_DOUBLE_EQ(it->second, static_cast<double>(dropped_frames));
+
+  it = stats_map.find(StatsEventSubscriber::DURATION_MS);
+  ASSERT_TRUE(it != stats_map.end());
+
+  EXPECT_DOUBLE_EQ(it->second, (end_time - start_time).InMillisecondsF());
 }
 
 TEST_F(StatsEventSubscriberTest, Encode) {
   Init(VIDEO_EVENT);
 
   uint32 rtp_timestamp = 0;
   uint32 frame_id = 0;
   int num_frames = 10;
   base::TimeTicks start_time = sender_clock_->NowTicks();
   int total_size = 0;
@@ skipping 315 matching lines @@
   EXPECT_DOUBLE_EQ(it->second, static_cast<double>(num_packets_retransmitted));
 
   it = stats_map.find(StatsEventSubscriber::NUM_PACKETS_RTX_REJECTED);
   ASSERT_TRUE(it != stats_map.end());
 
   EXPECT_DOUBLE_EQ(it->second, static_cast<double>(num_packets_rtx_rejected));
 }
 
 }  // namespace cast
 }  // namespace media