media/mp4/offset_byte_queue_unittest.cc

   1 // Copyright (c) 2012 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 <string.h>
   6
   7 #include "base/basictypes.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "media/mp4/offset_byte_queue.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace media {
  13
  14 class OffsetByteQueueTest : public testing::Test {
  15  public:
  16   virtual void SetUp() OVERRIDE {
  17     uint8 buf[256];
  18     for (int i = 0; i < 256; i++) {
  19       buf[i] = i;
  20     }
  21     queue_.reset(new OffsetByteQueue);
  22     queue_->Push(buf, sizeof(buf));
  23     queue_->Push(buf, sizeof(buf));
  24     queue_->Pop(384);
  25
  26     // Queue will start with 128 bytes of data and an offset of 384 bytes.
  27     // These values are used throughout the test.
  28   }
  29
  30  protected:
  31   scoped_ptr<OffsetByteQueue> queue_;
  32 };
  33
  34 TEST_F(OffsetByteQueueTest, SetUp) {
  35   EXPECT_EQ(384, queue_->head());
  36   EXPECT_EQ(512, queue_->tail());
  37
  38   const uint8* buf;
  39   int size;
  40
  41   queue_->Peek(&buf, &size);
  42   EXPECT_EQ(128, size);
  43   EXPECT_EQ(128, buf[0]);
  44   EXPECT_EQ(255, buf[size-1]);
  45 }
  46
  47 TEST_F(OffsetByteQueueTest, PeekAt) {
  48   const uint8* buf;
  49   int size;
  50
  51   queue_->PeekAt(400, &buf, &size);
  52   EXPECT_EQ(queue_->tail() - 400, size);
  53   EXPECT_EQ(400 - 256, buf[0]);
  54
  55   queue_->PeekAt(512, &buf, &size);
  56   EXPECT_EQ(NULL, buf);
  57   EXPECT_EQ(0, size);
  58 }
  59
  60 TEST_F(OffsetByteQueueTest, Trim) {
  61   EXPECT_TRUE(queue_->Trim(128));
  62   EXPECT_TRUE(queue_->Trim(384));
  63   EXPECT_EQ(384, queue_->head());
  64   EXPECT_EQ(512, queue_->tail());
  65
  66   EXPECT_TRUE(queue_->Trim(400));
  67   EXPECT_EQ(400, queue_->head());
  68   EXPECT_EQ(512, queue_->tail());
  69
  70   const uint8* buf;
  71   int size;
  72   queue_->PeekAt(400, &buf, &size);
  73   EXPECT_EQ(queue_->tail() - 400, size);
  74   EXPECT_EQ(400 - 256, buf[0]);
  75
  76   // Trimming to the exact end of the buffer should return 'true'. This
  77   // accomodates EOS cases.
  78   EXPECT_TRUE(queue_->Trim(512));
  79   EXPECT_EQ(512, queue_->head());
  80   queue_->Peek(&buf, &size);
  81   EXPECT_EQ(NULL, buf);
  82
  83   // Trimming past the end of the buffer should return 'false'; we haven't seen
  84   // the preceeding bytes.
  85   EXPECT_FALSE(queue_->Trim(513));
  86
  87   // However, doing that shouldn't affect the EOS case. Only adding new data
  88   // should alter this behavior.
  89   EXPECT_TRUE(queue_->Trim(512));
  90 }
  91
  92 }  // namespace media