media/base/wall_clock_time_source_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/test/simple_test_tick_clock.h"
   6 #include "media/base/wall_clock_time_source.h"
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace media {
  10
  11 class WallClockTimeSourceTest : public testing::Test {
  12  public:
  13   WallClockTimeSourceTest() : tick_clock_(new base::SimpleTestTickClock()) {
  14     time_source_.set_tick_clock_for_testing(tick_clock_.get());
  15     AdvanceTimeInSeconds(1);
  16   }
  17   ~WallClockTimeSourceTest() override {}
  18
  19   void AdvanceTimeInSeconds(int seconds) {
  20     tick_clock_->Advance(base::TimeDelta::FromSeconds(seconds));
  21   }
  22
  23   int CurrentMediaTimeInSeconds() {
  24     return time_source_.CurrentMediaTime().InSeconds();
  25   }
  26
  27   void SetMediaTimeInSeconds(int seconds) {
  28     return time_source_.SetMediaTime(base::TimeDelta::FromSeconds(seconds));
  29   }
  30
  31   bool IsWallClockNowForMediaTimeInSeconds(int seconds) {
  32     std::vector<base::TimeTicks> wall_clock_times;
  33     EXPECT_TRUE(time_source_.GetWallClockTimes(
  34         std::vector<base::TimeDelta>(1, base::TimeDelta::FromSeconds(seconds)),
  35         &wall_clock_times));
  36     return tick_clock_->NowTicks() == wall_clock_times.front();
  37   }
  38
  39   bool IsTimeStopped() {
  40     std::vector<base::TimeTicks> wall_clock_times;
  41     // Convert any random value, it shouldn't matter for this call.
  42     const bool time_stopped = !time_source_.GetWallClockTimes(
  43         std::vector<base::TimeDelta>(1, base::TimeDelta::FromSeconds(1)),
  44         &wall_clock_times);
  45     EXPECT_EQ(time_stopped, wall_clock_times.empty());
  46     return time_stopped;
  47   }
  48
  49  protected:
  50   WallClockTimeSource time_source_;
  51   scoped_ptr<base::SimpleTestTickClock> tick_clock_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(WallClockTimeSourceTest);
  54 };
  55
  56 TEST_F(WallClockTimeSourceTest, InitialTimeIsZero) {
  57   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  58   EXPECT_TRUE(IsTimeStopped());
  59 }
  60
  61 TEST_F(WallClockTimeSourceTest, InitialTimeIsNotTicking) {
  62   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  63   EXPECT_TRUE(IsTimeStopped());
  64   AdvanceTimeInSeconds(100);
  65   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  66   EXPECT_TRUE(IsTimeStopped());
  67 }
  68
  69 TEST_F(WallClockTimeSourceTest, InitialPlaybackRateIsOne) {
  70   time_source_.StartTicking();
  71
  72   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  73   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(0));
  74   AdvanceTimeInSeconds(100);
  75   EXPECT_EQ(100, CurrentMediaTimeInSeconds());
  76   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(100));
  77 }
  78
  79 TEST_F(WallClockTimeSourceTest, SetMediaTime) {
  80   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  81   EXPECT_TRUE(IsTimeStopped());
  82   SetMediaTimeInSeconds(10);
  83   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
  84   EXPECT_TRUE(IsTimeStopped());
  85 }
  86
  87 TEST_F(WallClockTimeSourceTest, SetPlaybackRate) {
  88   time_source_.StartTicking();
  89
  90   time_source_.SetPlaybackRate(0.5);
  91   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  92   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(0));
  93   AdvanceTimeInSeconds(10);
  94   EXPECT_EQ(5, CurrentMediaTimeInSeconds());
  95   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(5));
  96
  97   time_source_.SetPlaybackRate(2);
  98   EXPECT_EQ(5, CurrentMediaTimeInSeconds());
  99   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(5));
 100   AdvanceTimeInSeconds(10);
 101   EXPECT_EQ(25, CurrentMediaTimeInSeconds());
 102   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(25));
 103 }
 104
 105 TEST_F(WallClockTimeSourceTest, StopTicking) {
 106   time_source_.StartTicking();
 107
 108   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
 109   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(0));
 110   AdvanceTimeInSeconds(10);
 111   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
 112   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(10));
 113
 114   time_source_.StopTicking();
 115
 116   AdvanceTimeInSeconds(10);
 117   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
 118   EXPECT_TRUE(IsTimeStopped());
 119 }
 120
 121 }  // namespace media