1 // Copyright 2014 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 "base/big_endian.h" 6 7 #include "base/strings/string_piece.h" 8 #include "testing/gtest/include/gtest/gtest.h" 9 10 namespace base { 11 12 TEST(BigEndianReaderTest, ReadsValues) { 13 char data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC }; 14 char buf[2]; 15 uint8 u8; 16 uint16 u16; 17 uint32 u32; 18 base::StringPiece piece; 19 BigEndianReader reader(data, sizeof(data)); 20 21 EXPECT_TRUE(reader.Skip(2)); 22 EXPECT_EQ(data + 2, reader.ptr()); 23 EXPECT_EQ(reader.remaining(), static_cast<int>(sizeof(data)) - 2); 24 EXPECT_TRUE(reader.ReadBytes(buf, sizeof(buf))); 25 EXPECT_EQ(0x2, buf[0]); 26 EXPECT_EQ(0x3, buf[1]); 27 EXPECT_TRUE(reader.ReadU8(&u8)); 28 EXPECT_EQ(0x4, u8); 29 EXPECT_TRUE(reader.ReadU16(&u16)); 30 EXPECT_EQ(0x0506, u16); 31 EXPECT_TRUE(reader.ReadU32(&u32)); 32 EXPECT_EQ(0x0708090Au, u32); 33 base::StringPiece expected(reader.ptr(), 2); 34 EXPECT_TRUE(reader.ReadPiece(&piece, 2)); 35 EXPECT_EQ(2u, piece.size()); 36 EXPECT_EQ(expected.data(), piece.data()); 37 } 38 39 TEST(BigEndianReaderTest, RespectsLength) { 40 char data[4]; 41 char buf[2]; 42 uint8 u8; 43 uint16 u16; 44 uint32 u32; 45 base::StringPiece piece; 46 BigEndianReader reader(data, sizeof(data)); 47 // 4 left 48 EXPECT_FALSE(reader.Skip(6)); 49 EXPECT_TRUE(reader.Skip(1)); 50 // 3 left 51 EXPECT_FALSE(reader.ReadU32(&u32)); 52 EXPECT_FALSE(reader.ReadPiece(&piece, 4)); 53 EXPECT_TRUE(reader.Skip(2)); 54 // 1 left 55 EXPECT_FALSE(reader.ReadU16(&u16)); 56 EXPECT_FALSE(reader.ReadBytes(buf, 2)); 57 EXPECT_TRUE(reader.Skip(1)); 58 // 0 left 59 EXPECT_FALSE(reader.ReadU8(&u8)); 60 EXPECT_EQ(0, reader.remaining()); 61 } 62 63 TEST(BigEndianWriterTest, WritesValues) { 64 char expected[] = { 0, 0, 2, 3, 4, 5, 6, 7, 8, 9, 0xA }; 65 char data[sizeof(expected)]; 66 char buf[] = { 0x2, 0x3 }; 67 memset(data, 0, sizeof(data)); 68 BigEndianWriter writer(data, sizeof(data)); 69 70 EXPECT_TRUE(writer.Skip(2)); 71 EXPECT_TRUE(writer.WriteBytes(buf, sizeof(buf))); 72 EXPECT_TRUE(writer.WriteU8(0x4)); 73 EXPECT_TRUE(writer.WriteU16(0x0506)); 74 EXPECT_TRUE(writer.WriteU32(0x0708090A)); 75 EXPECT_EQ(0, memcmp(expected, data, sizeof(expected))); 76 } 77 78 TEST(BigEndianWriterTest, RespectsLength) { 79 char data[4]; 80 char buf[2]; 81 uint8 u8 = 0; 82 uint16 u16 = 0; 83 uint32 u32 = 0; 84 BigEndianWriter writer(data, sizeof(data)); 85 // 4 left 86 EXPECT_FALSE(writer.Skip(6)); 87 EXPECT_TRUE(writer.Skip(1)); 88 // 3 left 89 EXPECT_FALSE(writer.WriteU32(u32)); 90 EXPECT_TRUE(writer.Skip(2)); 91 // 1 left 92 EXPECT_FALSE(writer.WriteU16(u16)); 93 EXPECT_FALSE(writer.WriteBytes(buf, 2)); 94 EXPECT_TRUE(writer.Skip(1)); 95 // 0 left 96 EXPECT_FALSE(writer.WriteU8(u8)); 97 EXPECT_EQ(0, writer.remaining()); 98 } 99 100 } // namespace base 101
