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_.SetTickClockForTesting(
  15         scoped_ptr<base::TickClock>(tick_clock_));
  16     AdvanceTimeInSeconds(1);
  17   }
  18   ~WallClockTimeSourceTest() override {}
  19
  20   void AdvanceTimeInSeconds(int seconds) {
  21     tick_clock_->Advance(base::TimeDelta::FromSeconds(seconds));
  22   }
  23
  24   int CurrentMediaTimeInSeconds() {
  25     return time_source_.CurrentMediaTime().InSeconds();
  26   }
  27
  28   void SetMediaTimeInSeconds(int seconds) {
  29     return time_source_.SetMediaTime(base::TimeDelta::FromSeconds(seconds));
  30   }
  31
  32   bool IsWallClockNowForMediaTimeInSeconds(int seconds) {
  33     return tick_clock_->NowTicks() ==
  34            time_source_.GetWallClockTime(base::TimeDelta::FromSeconds(seconds));
  35   }
  36
  37   bool IsWallClockNullForMediaTimeInSeconds(int seconds) {
  38     return time_source_.GetWallClockTime(base::TimeDelta::FromSeconds(seconds))
  39         .is_null();
  40   }
  41
  42  protected:
  43   WallClockTimeSource time_source_;
  44   base::SimpleTestTickClock* tick_clock_;  // Owned by |time_source_|.
  45
  46   DISALLOW_COPY_AND_ASSIGN(WallClockTimeSourceTest);
  47 };
  48
  49 TEST_F(WallClockTimeSourceTest, InitialTimeIsZero) {
  50   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  51   EXPECT_TRUE(IsWallClockNullForMediaTimeInSeconds(0));
  52 }
  53
  54 TEST_F(WallClockTimeSourceTest, InitialTimeIsNotTicking) {
  55   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  56   EXPECT_TRUE(IsWallClockNullForMediaTimeInSeconds(0));
  57   AdvanceTimeInSeconds(100);
  58   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  59   EXPECT_TRUE(IsWallClockNullForMediaTimeInSeconds(0));
  60 }
  61
  62 TEST_F(WallClockTimeSourceTest, InitialPlaybackRateIsOne) {
  63   time_source_.StartTicking();
  64
  65   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  66   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(0));
  67   AdvanceTimeInSeconds(100);
  68   EXPECT_EQ(100, CurrentMediaTimeInSeconds());
  69   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(100));
  70 }
  71
  72 TEST_F(WallClockTimeSourceTest, SetMediaTime) {
  73   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  74   EXPECT_TRUE(IsWallClockNullForMediaTimeInSeconds(0));
  75   SetMediaTimeInSeconds(10);
  76   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
  77   EXPECT_TRUE(IsWallClockNullForMediaTimeInSeconds(10));
  78 }
  79
  80 TEST_F(WallClockTimeSourceTest, SetPlaybackRate) {
  81   time_source_.StartTicking();
  82
  83   time_source_.SetPlaybackRate(0.5);
  84   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  85   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(0));
  86   AdvanceTimeInSeconds(10);
  87   EXPECT_EQ(5, CurrentMediaTimeInSeconds());
  88   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(5));
  89
  90   time_source_.SetPlaybackRate(2);
  91   EXPECT_EQ(5, CurrentMediaTimeInSeconds());
  92   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(5));
  93   AdvanceTimeInSeconds(10);
  94   EXPECT_EQ(25, CurrentMediaTimeInSeconds());
  95   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(25));
  96 }
  97
  98 TEST_F(WallClockTimeSourceTest, StopTicking) {
  99   time_source_.StartTicking();
 100
 101   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
 102   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(0));
 103   AdvanceTimeInSeconds(10);
 104   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
 105   EXPECT_TRUE(IsWallClockNowForMediaTimeInSeconds(10));
 106
 107   time_source_.StopTicking();
 108
 109   AdvanceTimeInSeconds(10);
 110   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
 111   EXPECT_TRUE(IsWallClockNullForMediaTimeInSeconds(10));
 112 }
 113
 114 }  // namespace media