net/base/big_endian_unittest.cc

   1 // Copyright (c) 2011 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/string_piece.h"
   6 #include "net/base/big_endian.h"
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace net {
  10
  11 TEST(BigEndianReaderTest, ReadsValues) {
  12   char data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC };
  13   char buf[2];
  14   uint8 u8;
  15   uint16 u16;
  16   uint32 u32;
  17   base::StringPiece piece;
  18   BigEndianReader reader(data, sizeof(data));
  19
  20   EXPECT_TRUE(reader.Skip(2));
  21   EXPECT_EQ(data + 2, reader.ptr());
  22   EXPECT_EQ(reader.remaining(), static_cast<int>(sizeof(data)) - 2);
  23   EXPECT_TRUE(reader.ReadBytes(buf, sizeof(buf)));
  24   EXPECT_EQ(0x2, buf[0]);
  25   EXPECT_EQ(0x3, buf[1]);
  26   EXPECT_TRUE(reader.ReadU8(&u8));
  27   EXPECT_EQ(0x4, u8);
  28   EXPECT_TRUE(reader.ReadU16(&u16));
  29   EXPECT_EQ(0x0506, u16);
  30   EXPECT_TRUE(reader.ReadU32(&u32));
  31   EXPECT_EQ(0x0708090Au, u32);
  32   base::StringPiece expected(reader.ptr(), 2);
  33   EXPECT_TRUE(reader.ReadPiece(&piece, 2));
  34   EXPECT_EQ(2u, piece.size());
  35   EXPECT_EQ(expected.data(), piece.data());
  36 }
  37
  38 TEST(BigEndianReaderTest, RespectsLength) {
  39   char data[4];
  40   char buf[2];
  41   uint8 u8;
  42   uint16 u16;
  43   uint32 u32;
  44   base::StringPiece piece;
  45   BigEndianReader reader(data, sizeof(data));
  46   // 4 left
  47   EXPECT_FALSE(reader.Skip(6));
  48   EXPECT_TRUE(reader.Skip(1));
  49   // 3 left
  50   EXPECT_FALSE(reader.ReadU32(&u32));
  51   EXPECT_FALSE(reader.ReadPiece(&piece, 4));
  52   EXPECT_TRUE(reader.Skip(2));
  53   // 1 left
  54   EXPECT_FALSE(reader.ReadU16(&u16));
  55   EXPECT_FALSE(reader.ReadBytes(buf, 2));
  56   EXPECT_TRUE(reader.Skip(1));
  57   // 0 left
  58   EXPECT_FALSE(reader.ReadU8(&u8));
  59   EXPECT_EQ(0, reader.remaining());
  60 }
  61
  62 TEST(BigEndianWriterTest, WritesValues) {
  63   char expected[] = { 0, 0, 2, 3, 4, 5, 6, 7, 8, 9, 0xA };
  64   char data[sizeof(expected)];
  65   char buf[] = { 0x2, 0x3 };
  66   memset(data, 0, sizeof(data));
  67   BigEndianWriter writer(data, sizeof(data));
  68
  69   EXPECT_TRUE(writer.Skip(2));
  70   EXPECT_TRUE(writer.WriteBytes(buf, sizeof(buf)));
  71   EXPECT_TRUE(writer.WriteU8(0x4));
  72   EXPECT_TRUE(writer.WriteU16(0x0506));
  73   EXPECT_TRUE(writer.WriteU32(0x0708090A));
  74   EXPECT_EQ(0, memcmp(expected, data, sizeof(expected)));
  75 }
  76
  77 TEST(BigEndianWriterTest, RespectsLength) {
  78   char data[4];
  79   char buf[2];
  80   uint8 u8 = 0;
  81   uint16 u16 = 0;
  82   uint32 u32 = 0;
  83   BigEndianWriter writer(data, sizeof(data));
  84   // 4 left
  85   EXPECT_FALSE(writer.Skip(6));
  86   EXPECT_TRUE(writer.Skip(1));
  87   // 3 left
  88   EXPECT_FALSE(writer.WriteU32(u32));
  89   EXPECT_TRUE(writer.Skip(2));
  90   // 1 left
  91   EXPECT_FALSE(writer.WriteU16(u16));
  92   EXPECT_FALSE(writer.WriteBytes(buf, 2));
  93   EXPECT_TRUE(writer.Skip(1));
  94   // 0 left
  95   EXPECT_FALSE(writer.WriteU8(u8));
  96   EXPECT_EQ(0, writer.remaining());
  97 }
  98
  99 }  // namespace net
 100