blob: 3255151d050ec3d68149a466729c5180aa81c2fd [file] [log] [blame]
/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "test/testsupport/packet_reader.h"
#include "test/gtest.h"
#include "test/testsupport/unittest_utils.h"
namespace webrtc {
namespace test {
class PacketReaderTest: public PacketRelatedTest {
protected:
PacketReaderTest() {}
virtual ~PacketReaderTest() {}
void SetUp() {
reader_ = new PacketReader();
}
void TearDown() {
delete reader_;
}
void VerifyPacketData(size_t expected_length,
int actual_length,
uint8_t* original_data_pointer,
uint8_t* new_data_pointer) {
EXPECT_EQ(static_cast<int>(expected_length), actual_length);
EXPECT_EQ(*original_data_pointer, *new_data_pointer);
EXPECT_EQ(0, memcmp(original_data_pointer, new_data_pointer,
actual_length));
}
PacketReader* reader_;
};
// Test lack of initialization
TEST_F(PacketReaderTest, Uninitialized) {
uint8_t* data_pointer = NULL;
EXPECT_EQ(-1, reader_->NextPacket(&data_pointer));
EXPECT_EQ(NULL, data_pointer);
}
TEST_F(PacketReaderTest, InitializeZeroLengthArgument) {
reader_->InitializeReading(packet_data_, 0, kPacketSizeInBytes);
ASSERT_EQ(0, reader_->NextPacket(&packet_data_pointer_));
}
// Test with something smaller than one packet
TEST_F(PacketReaderTest, NormalSmallData) {
const int kDataLengthInBytes = 1499;
uint8_t data[kDataLengthInBytes];
uint8_t* data_pointer = data;
memset(data, 1, kDataLengthInBytes);
reader_->InitializeReading(data, kDataLengthInBytes, kPacketSizeInBytes);
int length_to_read = reader_->NextPacket(&data_pointer);
VerifyPacketData(kDataLengthInBytes, length_to_read, data, data_pointer);
EXPECT_EQ(0, data_pointer - data); // pointer hasn't moved
// Reading another one shall result in 0 bytes:
length_to_read = reader_->NextPacket(&data_pointer);
EXPECT_EQ(0, length_to_read);
EXPECT_EQ(kDataLengthInBytes, data_pointer - data);
}
// Test with data length that exactly matches one packet
TEST_F(PacketReaderTest, NormalOnePacketData) {
uint8_t data[kPacketSizeInBytes];
uint8_t* data_pointer = data;
memset(data, 1, kPacketSizeInBytes);
reader_->InitializeReading(data, kPacketSizeInBytes, kPacketSizeInBytes);
int length_to_read = reader_->NextPacket(&data_pointer);
VerifyPacketData(kPacketSizeInBytes, length_to_read, data, data_pointer);
EXPECT_EQ(0, data_pointer - data); // pointer hasn't moved
// Reading another one shall result in 0 bytes:
length_to_read = reader_->NextPacket(&data_pointer);
EXPECT_EQ(0, length_to_read);
EXPECT_EQ(kPacketSizeInBytes, static_cast<size_t>(data_pointer - data));
}
// Test with data length that will result in 3 packets
TEST_F(PacketReaderTest, NormalLargeData) {
reader_->InitializeReading(packet_data_, kPacketDataLength,
kPacketSizeInBytes);
int length_to_read = reader_->NextPacket(&packet_data_pointer_);
VerifyPacketData(kPacketSizeInBytes, length_to_read,
packet1_, packet_data_pointer_);
length_to_read = reader_->NextPacket(&packet_data_pointer_);
VerifyPacketData(kPacketSizeInBytes, length_to_read,
packet2_, packet_data_pointer_);
length_to_read = reader_->NextPacket(&packet_data_pointer_);
VerifyPacketData(1u, length_to_read,
packet3_, packet_data_pointer_);
// Reading another one shall result in 0 bytes:
length_to_read = reader_->NextPacket(&packet_data_pointer_);
EXPECT_EQ(0, length_to_read);
EXPECT_EQ(kPacketDataLength,
static_cast<size_t>(packet_data_pointer_ - packet_data_));
}
// Test with empty data.
TEST_F(PacketReaderTest, EmptyData) {
const int kDataLengthInBytes = 0;
// But don't really try to allocate a zero-length array...
uint8_t data[kPacketSizeInBytes];
uint8_t* data_pointer = data;
reader_->InitializeReading(data, kDataLengthInBytes, kPacketSizeInBytes);
EXPECT_EQ(kDataLengthInBytes, reader_->NextPacket(&data_pointer));
// Do it again to make sure nothing changes
EXPECT_EQ(kDataLengthInBytes, reader_->NextPacket(&data_pointer));
}
} // namespace test
} // namespace webrtc