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117 lines
3.2 KiB
117 lines
3.2 KiB
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/big_endian.h"
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#include <stdint.h>
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#include "base/strings/string_piece.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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TEST(BigEndianReaderTest, ReadsValues) {
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char data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF,
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0x1A, 0x2B, 0x3C, 0x4D, 0x5E };
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char buf[2];
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uint8_t u8;
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uint16_t u16;
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uint32_t u32;
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uint64_t u64;
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base::StringPiece piece;
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BigEndianReader reader(data, sizeof(data));
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EXPECT_TRUE(reader.Skip(2));
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EXPECT_EQ(data + 2, reader.ptr());
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EXPECT_EQ(reader.remaining(), static_cast<int>(sizeof(data)) - 2);
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EXPECT_TRUE(reader.ReadBytes(buf, sizeof(buf)));
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EXPECT_EQ(0x2, buf[0]);
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EXPECT_EQ(0x3, buf[1]);
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EXPECT_TRUE(reader.ReadU8(&u8));
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EXPECT_EQ(0x4, u8);
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EXPECT_TRUE(reader.ReadU16(&u16));
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EXPECT_EQ(0x0506, u16);
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EXPECT_TRUE(reader.ReadU32(&u32));
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EXPECT_EQ(0x0708090Au, u32);
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EXPECT_TRUE(reader.ReadU64(&u64));
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EXPECT_EQ(0x0B0C0D0E0F1A2B3Cllu, u64);
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base::StringPiece expected(reader.ptr(), 2);
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EXPECT_TRUE(reader.ReadPiece(&piece, 2));
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EXPECT_EQ(2u, piece.size());
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EXPECT_EQ(expected.data(), piece.data());
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}
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TEST(BigEndianReaderTest, RespectsLength) {
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char data[8];
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char buf[2];
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uint8_t u8;
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uint16_t u16;
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uint32_t u32;
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uint64_t u64;
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base::StringPiece piece;
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BigEndianReader reader(data, sizeof(data));
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// 8 left
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EXPECT_FALSE(reader.Skip(9));
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EXPECT_TRUE(reader.Skip(1));
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// 7 left
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EXPECT_FALSE(reader.ReadU64(&u64));
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EXPECT_TRUE(reader.Skip(4));
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// 3 left
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EXPECT_FALSE(reader.ReadU32(&u32));
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EXPECT_FALSE(reader.ReadPiece(&piece, 4));
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EXPECT_TRUE(reader.Skip(2));
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// 1 left
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EXPECT_FALSE(reader.ReadU16(&u16));
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EXPECT_FALSE(reader.ReadBytes(buf, 2));
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EXPECT_TRUE(reader.Skip(1));
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// 0 left
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EXPECT_FALSE(reader.ReadU8(&u8));
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EXPECT_EQ(0, reader.remaining());
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}
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TEST(BigEndianWriterTest, WritesValues) {
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char expected[] = { 0, 0, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC, 0xD, 0xE,
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0xF, 0x1A, 0x2B, 0x3C };
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char data[sizeof(expected)];
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char buf[] = { 0x2, 0x3 };
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memset(data, 0, sizeof(data));
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BigEndianWriter writer(data, sizeof(data));
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EXPECT_TRUE(writer.Skip(2));
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EXPECT_TRUE(writer.WriteBytes(buf, sizeof(buf)));
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EXPECT_TRUE(writer.WriteU8(0x4));
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EXPECT_TRUE(writer.WriteU16(0x0506));
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EXPECT_TRUE(writer.WriteU32(0x0708090A));
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EXPECT_TRUE(writer.WriteU64(0x0B0C0D0E0F1A2B3Cllu));
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EXPECT_EQ(0, memcmp(expected, data, sizeof(expected)));
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}
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TEST(BigEndianWriterTest, RespectsLength) {
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char data[8];
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char buf[2];
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uint8_t u8 = 0;
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uint16_t u16 = 0;
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uint32_t u32 = 0;
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uint64_t u64 = 0;
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BigEndianWriter writer(data, sizeof(data));
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// 8 left
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EXPECT_FALSE(writer.Skip(9));
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EXPECT_TRUE(writer.Skip(1));
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// 7 left
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EXPECT_FALSE(writer.WriteU64(u64));
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EXPECT_TRUE(writer.Skip(4));
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// 3 left
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EXPECT_FALSE(writer.WriteU32(u32));
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EXPECT_TRUE(writer.Skip(2));
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// 1 left
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EXPECT_FALSE(writer.WriteU16(u16));
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EXPECT_FALSE(writer.WriteBytes(buf, 2));
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EXPECT_TRUE(writer.Skip(1));
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// 0 left
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EXPECT_FALSE(writer.WriteU8(u8));
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EXPECT_EQ(0, writer.remaining());
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}
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} // namespace base
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