andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include "testsupport/packet_reader.h" |
| 12 | |
| 13 | #include "gtest/gtest.h" |
| 14 | #include "testsupport/unittest_utils.h" |
| 15 | |
| 16 | namespace webrtc { |
| 17 | namespace test { |
| 18 | |
| 19 | class PacketReaderTest: public PacketRelatedTest { |
| 20 | protected: |
| 21 | PacketReaderTest() {} |
| 22 | virtual ~PacketReaderTest() {} |
| 23 | void SetUp() { |
| 24 | reader_ = new PacketReader(); |
| 25 | } |
| 26 | void TearDown() { |
| 27 | delete reader_; |
| 28 | } |
| 29 | void VerifyPacketData(int expected_length, |
| 30 | int actual_length, |
| 31 | WebRtc_UWord8* original_data_pointer, |
| 32 | WebRtc_UWord8* new_data_pointer) { |
| 33 | EXPECT_EQ(expected_length, actual_length); |
| 34 | EXPECT_EQ(*original_data_pointer, *new_data_pointer); |
| 35 | EXPECT_EQ(0, memcmp(original_data_pointer, new_data_pointer, |
| 36 | actual_length)); |
| 37 | } |
| 38 | PacketReader* reader_; |
| 39 | }; |
| 40 | |
| 41 | // Test lack of initialization |
| 42 | TEST_F(PacketReaderTest, Uninitialized) { |
| 43 | WebRtc_UWord8* data_pointer = NULL; |
| 44 | EXPECT_EQ(-1, reader_->NextPacket(&data_pointer)); |
| 45 | EXPECT_EQ(NULL, data_pointer); |
| 46 | } |
| 47 | |
| 48 | TEST_F(PacketReaderTest, InitializeZeroLengthArgument) { |
| 49 | reader_->InitializeReading(packet_data_, 0, kPacketSizeInBytes); |
| 50 | ASSERT_EQ(0, reader_->NextPacket(&packet_data_pointer_)); |
| 51 | } |
| 52 | |
| 53 | // Test with something smaller than one packet |
| 54 | TEST_F(PacketReaderTest, NormalSmallData) { |
| 55 | const int kDataLengthInBytes = 1499; |
| 56 | WebRtc_UWord8 data[kDataLengthInBytes]; |
| 57 | WebRtc_UWord8* data_pointer = data; |
| 58 | memset(data, 1, kDataLengthInBytes); |
| 59 | |
| 60 | reader_->InitializeReading(data, kDataLengthInBytes, kPacketSizeInBytes); |
| 61 | int length_to_read = reader_->NextPacket(&data_pointer); |
| 62 | VerifyPacketData(kDataLengthInBytes, length_to_read, data, data_pointer); |
| 63 | EXPECT_EQ(0, data_pointer - data); // pointer hasn't moved |
| 64 | |
| 65 | // Reading another one shall result in 0 bytes: |
| 66 | length_to_read = reader_->NextPacket(&data_pointer); |
| 67 | EXPECT_EQ(0, length_to_read); |
| 68 | EXPECT_EQ(kDataLengthInBytes, data_pointer - data); |
| 69 | } |
| 70 | |
| 71 | // Test with data length that exactly matches one packet |
| 72 | TEST_F(PacketReaderTest, NormalOnePacketData) { |
| 73 | WebRtc_UWord8 data[kPacketSizeInBytes]; |
| 74 | WebRtc_UWord8* data_pointer = data; |
| 75 | memset(data, 1, kPacketSizeInBytes); |
| 76 | |
| 77 | reader_->InitializeReading(data, kPacketSizeInBytes, kPacketSizeInBytes); |
| 78 | int length_to_read = reader_->NextPacket(&data_pointer); |
| 79 | VerifyPacketData(kPacketSizeInBytes, length_to_read, data, data_pointer); |
| 80 | EXPECT_EQ(0, data_pointer - data); // pointer hasn't moved |
| 81 | |
| 82 | // Reading another one shall result in 0 bytes: |
| 83 | length_to_read = reader_->NextPacket(&data_pointer); |
| 84 | EXPECT_EQ(0, length_to_read); |
| 85 | EXPECT_EQ(kPacketSizeInBytes, data_pointer - data); |
| 86 | } |
| 87 | |
| 88 | // Test with data length that will result in 3 packets |
| 89 | TEST_F(PacketReaderTest, NormalLargeData) { |
| 90 | reader_->InitializeReading(packet_data_, kPacketDataLength, |
| 91 | kPacketSizeInBytes); |
| 92 | |
| 93 | int length_to_read = reader_->NextPacket(&packet_data_pointer_); |
| 94 | VerifyPacketData(kPacketSizeInBytes, length_to_read, |
| 95 | packet1_, packet_data_pointer_); |
| 96 | |
| 97 | length_to_read = reader_->NextPacket(&packet_data_pointer_); |
| 98 | VerifyPacketData(kPacketSizeInBytes, length_to_read, |
| 99 | packet2_, packet_data_pointer_); |
| 100 | |
| 101 | length_to_read = reader_->NextPacket(&packet_data_pointer_); |
| 102 | VerifyPacketData(1u, length_to_read, |
| 103 | packet3_, packet_data_pointer_); |
| 104 | |
| 105 | // Reading another one shall result in 0 bytes: |
| 106 | length_to_read = reader_->NextPacket(&packet_data_pointer_); |
| 107 | EXPECT_EQ(0, length_to_read); |
| 108 | EXPECT_EQ(kPacketDataLength, packet_data_pointer_ - packet_data_); |
| 109 | } |
| 110 | |
| 111 | // Test with empty data. |
| 112 | TEST_F(PacketReaderTest, EmptyData) { |
| 113 | const int kDataLengthInBytes = 0; |
| 114 | // But don't really try to allocate a zero-length array... |
| 115 | WebRtc_UWord8 data[kPacketSizeInBytes]; |
| 116 | WebRtc_UWord8* data_pointer = data; |
| 117 | reader_->InitializeReading(data, kDataLengthInBytes, kPacketSizeInBytes); |
| 118 | EXPECT_EQ(kDataLengthInBytes, reader_->NextPacket(&data_pointer)); |
| 119 | // Do it again to make sure nothing changes |
| 120 | EXPECT_EQ(kDataLengthInBytes, reader_->NextPacket(&data_pointer)); |
| 121 | } |
| 122 | |
| 123 | } // namespace test |
| 124 | } // namespace webrtc |