media/base/text_ranges_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 "media/base/text_ranges.h"
   6
   7 #include "base/time/time.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace media {
  11
  12 class TextRangesTest : public ::testing::Test {
  13  protected:
  14   bool AddCue(int seconds) {
  15     return ranges_.AddCue(base::TimeDelta::FromSeconds(seconds));
  16   }
  17
  18   void Reset() {
  19     ranges_.Reset();
  20   }
  21
  22   size_t RangeCount() {
  23     return ranges_.RangeCountForTesting();
  24   }
  25
  26   TextRanges ranges_;
  27 };
  28
  29 TEST_F(TextRangesTest, TestEmptyRanges) {
  30   // Create a new active range, with t=5.
  31   EXPECT_TRUE(AddCue(5));
  32
  33   // Create a new active range, with t=2.
  34   Reset();
  35   EXPECT_TRUE(AddCue(2));
  36
  37   // Create a new active range, with t=8.
  38   Reset();
  39   EXPECT_TRUE(AddCue(8));
  40
  41   Reset();
  42
  43   // Make range [2, 2] active.
  44   EXPECT_FALSE(AddCue(2));
  45   EXPECT_EQ(RangeCount(), 3U);
  46
  47   // Coalesce first two ranges: [2, 5].
  48   EXPECT_FALSE(AddCue(5));
  49   EXPECT_EQ(RangeCount(), 2U);
  50
  51   // Coalesce first two ranges: [2, 8].
  52   EXPECT_FALSE(AddCue(8));
  53   EXPECT_EQ(RangeCount(), 1U);
  54
  55   // Add new cue to end of (only) range.
  56   EXPECT_TRUE(AddCue(9));
  57   EXPECT_EQ(RangeCount(), 1U);
  58 }
  59
  60 TEST_F(TextRangesTest, TestOneRange) {
  61   // Create a new active range, with t=0.
  62   EXPECT_TRUE(AddCue(0));
  63
  64   // Add cues to end of existing range.
  65   EXPECT_TRUE(AddCue(1));
  66   EXPECT_TRUE(AddCue(4));
  67
  68   Reset();
  69   EXPECT_FALSE(AddCue(2));
  70   EXPECT_FALSE(AddCue(3));
  71   EXPECT_FALSE(AddCue(4));
  72 }
  73
  74 TEST_F(TextRangesTest, TestDuplicateLast) {
  75   // Create a new active range, with t=0.
  76   EXPECT_TRUE(AddCue(0));
  77   EXPECT_TRUE(AddCue(1));
  78
  79   Reset();
  80   EXPECT_FALSE(AddCue(1));
  81   EXPECT_TRUE(AddCue(1));
  82 }
  83
  84 TEST_F(TextRangesTest, TestTwoRanges) {
  85   // Create a new active range, with t=0.
  86   EXPECT_TRUE(AddCue(0));
  87
  88   // Add cue to end of existing range.
  89   EXPECT_TRUE(AddCue(2));
  90
  91   Reset();
  92
  93   // Create a new active range, with t=4.
  94   EXPECT_TRUE(AddCue(4));
  95
  96   // Add a new cue to end of last (active) range.
  97   EXPECT_TRUE(AddCue(5));
  98
  99   Reset();
 100
 101   // Make first range active.
 102   EXPECT_FALSE(AddCue(0));
 103   EXPECT_FALSE(AddCue(2));
 104
 105   // Expand first range.
 106   EXPECT_TRUE(AddCue(3));
 107
 108   // Coalesce first and second ranges.
 109   EXPECT_FALSE(AddCue(4));
 110   EXPECT_EQ(RangeCount(), 1U);
 111 }
 112
 113 TEST_F(TextRangesTest, TestThreeRanges) {
 114   // Create a new active range, with t=0.
 115   EXPECT_TRUE(AddCue(0));
 116
 117   // Add cue to end of existing range.
 118   EXPECT_TRUE(AddCue(2));
 119
 120   Reset();
 121
 122   // Create a new active range, with t=4.
 123   EXPECT_TRUE(AddCue(4));
 124
 125   // Add a new cue to end of last (active) range.
 126   EXPECT_TRUE(AddCue(5));
 127
 128   Reset();
 129
 130   // Create a new active range, in between the other two.
 131   EXPECT_TRUE(AddCue(3));
 132
 133   // Coalesce middle and last ranges.
 134   EXPECT_FALSE(AddCue(4));
 135
 136   Reset();
 137
 138   // Make first range active.
 139   EXPECT_FALSE(AddCue(0));
 140   EXPECT_FALSE(AddCue(2));
 141
 142   // Coalesce first and last ranges.
 143   EXPECT_FALSE(AddCue(3));
 144   EXPECT_EQ(RangeCount(), 1U);
 145 }
 146
 147 }  // namespace media