OLD | NEW |
(Empty) | |
| 1 // Copyright 2017 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 "net/tools/transport_security_state_generator/bit_writer.h" |
| 6 #include "testing/gtest/include/gtest/gtest.h" |
| 7 |
| 8 namespace net { |
| 9 |
| 10 namespace transport_security_state { |
| 11 |
| 12 // Test that single bits are written to the buffer correctly. |
| 13 TEST(BitWriterTest, WriteBit) { |
| 14 BitWriter writer; |
| 15 |
| 16 EXPECT_EQ(0U, writer.position()); |
| 17 EXPECT_EQ(0U, writer.bytes().size()); |
| 18 |
| 19 writer.WriteBit(0); |
| 20 |
| 21 EXPECT_EQ(1U, writer.position()); |
| 22 EXPECT_EQ(0U, writer.bytes().size()); |
| 23 |
| 24 writer.WriteBit(1); |
| 25 writer.WriteBit(0); |
| 26 writer.WriteBit(1); |
| 27 writer.WriteBit(0); |
| 28 writer.WriteBit(1); |
| 29 writer.WriteBit(0); |
| 30 writer.WriteBit(1); |
| 31 |
| 32 EXPECT_EQ(8U, writer.position()); |
| 33 EXPECT_EQ(1U, writer.bytes().size()); |
| 34 |
| 35 // 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 = 0x55. |
| 36 EXPECT_EQ(0x55, writer.bytes()[0]); |
| 37 |
| 38 writer.WriteBit(0); |
| 39 |
| 40 EXPECT_EQ(9U, writer.position()); |
| 41 EXPECT_EQ(1U, writer.bytes().size()); |
| 42 |
| 43 writer.WriteBit(1); |
| 44 writer.WriteBit(0); |
| 45 |
| 46 EXPECT_EQ(11U, writer.position()); |
| 47 EXPECT_EQ(1U, writer.bytes().size()); |
| 48 |
| 49 // Flush should pad the current byte with zero's until it's full. |
| 50 writer.Flush(); |
| 51 |
| 52 // The writer should have 2 bytes now even though we only wrote 11 bits. |
| 53 EXPECT_EQ(16U, writer.position()); |
| 54 EXPECT_EQ(2U, writer.bytes().size()); |
| 55 |
| 56 // 0 | 1 | 0 | 00000 (padding) = 0x40. |
| 57 EXPECT_EQ(0x40, writer.bytes()[1]); |
| 58 } |
| 59 |
| 60 // Test that when multiple bits are written to the buffer, they are appended |
| 61 // correctly. |
| 62 TEST(BitWriterTest, WriteBits) { |
| 63 BitWriter writer; |
| 64 |
| 65 writer.WriteBits(170, 1); |
| 66 |
| 67 EXPECT_EQ(1U, writer.position()); |
| 68 EXPECT_EQ(0U, writer.bytes().size()); |
| 69 |
| 70 writer.WriteBits(170, 2); |
| 71 |
| 72 EXPECT_EQ(3U, writer.position()); |
| 73 EXPECT_EQ(0U, writer.bytes().size()); |
| 74 |
| 75 writer.WriteBits(170, 3); |
| 76 |
| 77 EXPECT_EQ(6U, writer.position()); |
| 78 EXPECT_EQ(0U, writer.bytes().size()); |
| 79 |
| 80 writer.WriteBits(170, 2); |
| 81 |
| 82 EXPECT_EQ(8U, writer.position()); |
| 83 EXPECT_EQ(1U, writer.bytes().size()); |
| 84 |
| 85 // 0 | 10 | 010 | 10 = 0x4A. |
| 86 EXPECT_EQ(0x4A, writer.bytes()[0]); |
| 87 |
| 88 writer.WriteBits(170, 2); |
| 89 |
| 90 EXPECT_EQ(10U, writer.position()); |
| 91 EXPECT_EQ(1U, writer.bytes().size()); |
| 92 |
| 93 // Flush should pad the current byte with zero's until it's full. |
| 94 writer.Flush(); |
| 95 |
| 96 // The writer should have 2 bytes now even though we only wrote 10 bits. |
| 97 EXPECT_EQ(16U, writer.position()); |
| 98 EXPECT_EQ(2U, writer.bytes().size()); |
| 99 |
| 100 // 10 | 000000 (padding) = 0x80 |
| 101 EXPECT_EQ(0x80, writer.bytes()[1]); |
| 102 } |
| 103 |
| 104 // Test that buffering works correct when the methods are mixed. |
| 105 TEST(BitWriterTest, WriteBoth) { |
| 106 BitWriter writer; |
| 107 |
| 108 writer.WriteBits(170, 1); |
| 109 |
| 110 EXPECT_EQ(1U, writer.position()); |
| 111 EXPECT_EQ(0U, writer.bytes().size()); |
| 112 |
| 113 writer.WriteBit(1); |
| 114 writer.WriteBits(170, 2); |
| 115 |
| 116 EXPECT_EQ(4U, writer.position()); |
| 117 EXPECT_EQ(0U, writer.bytes().size()); |
| 118 |
| 119 writer.WriteBits(170, 3); |
| 120 |
| 121 EXPECT_EQ(7U, writer.position()); |
| 122 EXPECT_EQ(0U, writer.bytes().size()); |
| 123 |
| 124 writer.WriteBit(1); |
| 125 |
| 126 EXPECT_EQ(8U, writer.position()); |
| 127 EXPECT_EQ(1U, writer.bytes().size()); |
| 128 |
| 129 // 0 | 1 | 10 | 010 | 1 = 0x65 |
| 130 EXPECT_EQ(0x65, writer.bytes()[0]); |
| 131 |
| 132 writer.WriteBits(170, 2); |
| 133 writer.WriteBit(0); |
| 134 |
| 135 EXPECT_EQ(11U, writer.position()); |
| 136 EXPECT_EQ(1U, writer.bytes().size()); |
| 137 |
| 138 // Flush should pad the current byte with zero's until it's full. |
| 139 writer.Flush(); |
| 140 |
| 141 // The writer should have 2 bytes now even though we only wrote 10 bits. |
| 142 EXPECT_EQ(16U, writer.position()); |
| 143 EXPECT_EQ(2U, writer.bytes().size()); |
| 144 |
| 145 // 10 | 0 | 00000 (padding) = 0x80 |
| 146 EXPECT_EQ(0x80, writer.bytes()[1]); |
| 147 } |
| 148 |
| 149 } // transport_security_state |
| 150 |
| 151 } // namespace net |
OLD | NEW |