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// Copyright (c) 2012 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 <string.h>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "media/mp4/offset_byte_queue.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
class OffsetByteQueueTest : public testing::Test {
public:
virtual void SetUp() OVERRIDE {
uint8 buf[256];
for (int i = 0; i < 256; i++) {
buf[i] = i;
}
queue_.reset(new OffsetByteQueue);
queue_->Push(buf, sizeof(buf));
queue_->Push(buf, sizeof(buf));
queue_->Pop(384);
// Queue will start with 128 bytes of data and an offset of 384 bytes.
// These values are used throughout the test.
}
protected:
scoped_ptr<OffsetByteQueue> queue_;
};
TEST_F(OffsetByteQueueTest, SetUp) {
EXPECT_EQ(384, queue_->head());
EXPECT_EQ(512, queue_->tail());
const uint8* buf;
int size;
queue_->Peek(&buf, &size);
EXPECT_EQ(128, size);
EXPECT_EQ(128, buf[0]);
EXPECT_EQ(255, buf[size-1]);
}
TEST_F(OffsetByteQueueTest, PeekAt) {
const uint8* buf;
int size;
queue_->PeekAt(400, &buf, &size);
EXPECT_EQ(queue_->tail() - 400, size);
EXPECT_EQ(400 - 256, buf[0]);
queue_->PeekAt(512, &buf, &size);
EXPECT_EQ(NULL, buf);
EXPECT_EQ(0, size);
}
TEST_F(OffsetByteQueueTest, Trim) {
EXPECT_TRUE(queue_->Trim(128));
EXPECT_TRUE(queue_->Trim(384));
EXPECT_EQ(384, queue_->head());
EXPECT_EQ(512, queue_->tail());
EXPECT_TRUE(queue_->Trim(400));
EXPECT_EQ(400, queue_->head());
EXPECT_EQ(512, queue_->tail());
const uint8* buf;
int size;
queue_->PeekAt(400, &buf, &size);
EXPECT_EQ(queue_->tail() - 400, size);
EXPECT_EQ(400 - 256, buf[0]);
// Trimming to the exact end of the buffer should return 'true'. This
// accomodates EOS cases.
EXPECT_TRUE(queue_->Trim(512));
EXPECT_EQ(512, queue_->head());
queue_->Peek(&buf, &size);
EXPECT_EQ(NULL, buf);
// Trimming past the end of the buffer should return 'false'; we haven't seen
// the preceeding bytes.
EXPECT_FALSE(queue_->Trim(513));
// However, doing that shouldn't affect the EOS case. Only adding new data
// should alter this behavior.
EXPECT_TRUE(queue_->Trim(512));
}
} // namespace media
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