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protobuf/csharp/compatibility_tests/v3.0.0/src/Google.Protobuf.Test/CodedOutputStreamTest.cs

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#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#endregion
using System;
using System.IO;
using Google.Protobuf.TestProtos;
using NUnit.Framework;
namespace Google.Protobuf
{
public class CodedOutputStreamTest
{
/// <summary>
/// Writes the given value using WriteRawVarint32() and WriteRawVarint64() and
/// checks that the result matches the given bytes
/// </summary>
private static void AssertWriteVarint(byte[] data, ulong value)
{
// Only do 32-bit write if the value fits in 32 bits.
if ((value >> 32) == 0)
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output = new CodedOutputStream(rawOutput);
output.WriteRawVarint32((uint) value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
// Also try computing size.
Assert.AreEqual(data.Length, CodedOutputStream.ComputeRawVarint32Size((uint) value));
}
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output = new CodedOutputStream(rawOutput);
output.WriteRawVarint64(value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
// Also try computing size.
Assert.AreEqual(data.Length, CodedOutputStream.ComputeRawVarint64Size(value));
}
// Try different buffer sizes.
for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2)
{
// Only do 32-bit write if the value fits in 32 bits.
if ((value >> 32) == 0)
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output =
new CodedOutputStream(rawOutput, bufferSize);
output.WriteRawVarint32((uint) value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
}
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output = new CodedOutputStream(rawOutput, bufferSize);
output.WriteRawVarint64(value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
}
}
}
/// <summary>
/// Tests WriteRawVarint32() and WriteRawVarint64()
/// </summary>
[Test]
public void WriteVarint()
{
AssertWriteVarint(new byte[] {0x00}, 0);
AssertWriteVarint(new byte[] {0x01}, 1);
AssertWriteVarint(new byte[] {0x7f}, 127);
// 14882
AssertWriteVarint(new byte[] {0xa2, 0x74}, (0x22 << 0) | (0x74 << 7));
// 2961488830
AssertWriteVarint(new byte[] {0xbe, 0xf7, 0x92, 0x84, 0x0b},
(0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
(0x0bL << 28));
// 64-bit
// 7256456126
AssertWriteVarint(new byte[] {0xbe, 0xf7, 0x92, 0x84, 0x1b},
(0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
(0x1bL << 28));
// 41256202580718336
AssertWriteVarint(
new byte[] {0x80, 0xe6, 0xeb, 0x9c, 0xc3, 0xc9, 0xa4, 0x49},
(0x00 << 0) | (0x66 << 7) | (0x6b << 14) | (0x1c << 21) |
(0x43UL << 28) | (0x49L << 35) | (0x24UL << 42) | (0x49UL << 49));
// 11964378330978735131
AssertWriteVarint(
new byte[] {0x9b, 0xa8, 0xf9, 0xc2, 0xbb, 0xd6, 0x80, 0x85, 0xa6, 0x01},
unchecked((ulong)
((0x1b << 0) | (0x28 << 7) | (0x79 << 14) | (0x42 << 21) |
(0x3bL << 28) | (0x56L << 35) | (0x00L << 42) |
(0x05L << 49) | (0x26L << 56) | (0x01L << 63))));
}
/// <summary>
/// Parses the given bytes using WriteRawLittleEndian32() and checks
/// that the result matches the given value.
/// </summary>
private static void AssertWriteLittleEndian32(byte[] data, uint value)
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output = new CodedOutputStream(rawOutput);
output.WriteRawLittleEndian32(value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
// Try different buffer sizes.
for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2)
{
rawOutput = new MemoryStream();
output = new CodedOutputStream(rawOutput, bufferSize);
output.WriteRawLittleEndian32(value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
}
}
/// <summary>
/// Parses the given bytes using WriteRawLittleEndian64() and checks
/// that the result matches the given value.
/// </summary>
private static void AssertWriteLittleEndian64(byte[] data, ulong value)
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output = new CodedOutputStream(rawOutput);
output.WriteRawLittleEndian64(value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
// Try different block sizes.
for (int blockSize = 1; blockSize <= 16; blockSize *= 2)
{
rawOutput = new MemoryStream();
output = new CodedOutputStream(rawOutput, blockSize);
output.WriteRawLittleEndian64(value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
}
}
/// <summary>
/// Tests writeRawLittleEndian32() and writeRawLittleEndian64().
/// </summary>
[Test]
public void WriteLittleEndian()
{
AssertWriteLittleEndian32(new byte[] {0x78, 0x56, 0x34, 0x12}, 0x12345678);
AssertWriteLittleEndian32(new byte[] {0xf0, 0xde, 0xbc, 0x9a}, 0x9abcdef0);
AssertWriteLittleEndian64(
new byte[] {0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12},
0x123456789abcdef0L);
AssertWriteLittleEndian64(
new byte[] {0x78, 0x56, 0x34, 0x12, 0xf0, 0xde, 0xbc, 0x9a},
0x9abcdef012345678UL);
}
[Test]
public void WriteWholeMessage_VaryingBlockSizes()
{
TestAllTypes message = SampleMessages.CreateFullTestAllTypes();
byte[] rawBytes = message.ToByteArray();
// Try different block sizes.
for (int blockSize = 1; blockSize < 256; blockSize *= 2)
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output = new CodedOutputStream(rawOutput, blockSize);
message.WriteTo(output);
output.Flush();
Assert.AreEqual(rawBytes, rawOutput.ToArray());
}
}
[Test]
public void EncodeZigZag32()
{
Assert.AreEqual(0u, WritingPrimitives.EncodeZigZag32(0));
Assert.AreEqual(1u, WritingPrimitives.EncodeZigZag32(-1));
Assert.AreEqual(2u, WritingPrimitives.EncodeZigZag32(1));
Assert.AreEqual(3u, WritingPrimitives.EncodeZigZag32(-2));
Assert.AreEqual(0x7FFFFFFEu, WritingPrimitives.EncodeZigZag32(0x3FFFFFFF));
Assert.AreEqual(0x7FFFFFFFu, WritingPrimitives.EncodeZigZag32(unchecked((int) 0xC0000000)));
Assert.AreEqual(0xFFFFFFFEu, WritingPrimitives.EncodeZigZag32(0x7FFFFFFF));
Assert.AreEqual(0xFFFFFFFFu, WritingPrimitives.EncodeZigZag32(unchecked((int) 0x80000000)));
}
[Test]
public void EncodeZigZag64()
{
Assert.AreEqual(0u, WritingPrimitives.EncodeZigZag64(0));
Assert.AreEqual(1u, WritingPrimitives.EncodeZigZag64(-1));
Assert.AreEqual(2u, WritingPrimitives.EncodeZigZag64(1));
Assert.AreEqual(3u, WritingPrimitives.EncodeZigZag64(-2));
Assert.AreEqual(0x000000007FFFFFFEuL,
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x000000003FFFFFFFUL)));
Assert.AreEqual(0x000000007FFFFFFFuL,
WritingPrimitives.EncodeZigZag64(unchecked((long) 0xFFFFFFFFC0000000UL)));
Assert.AreEqual(0x00000000FFFFFFFEuL,
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x000000007FFFFFFFUL)));
Assert.AreEqual(0x00000000FFFFFFFFuL,
WritingPrimitives.EncodeZigZag64(unchecked((long) 0xFFFFFFFF80000000UL)));
Assert.AreEqual(0xFFFFFFFFFFFFFFFEL,
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x7FFFFFFFFFFFFFFFUL)));
Assert.AreEqual(0xFFFFFFFFFFFFFFFFL,
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x8000000000000000UL)));
}
[Test]
public void RoundTripZigZag32()
{
// Some easier-to-verify round-trip tests. The inputs (other than 0, 1, -1)
// were chosen semi-randomly via keyboard bashing.
Assert.AreEqual(0, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(0)));
Assert.AreEqual(1, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(1)));
Assert.AreEqual(-1, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(-1)));
Assert.AreEqual(14927, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(14927)));
Assert.AreEqual(-3612, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(-3612)));
}
[Test]
public void RoundTripZigZag64()
{
Assert.AreEqual(0, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(0)));
Assert.AreEqual(1, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(1)));
Assert.AreEqual(-1, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(-1)));
Assert.AreEqual(14927, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(14927)));
Assert.AreEqual(-3612, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(-3612)));
Assert.AreEqual(856912304801416L,
ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(856912304801416L)));
Assert.AreEqual(-75123905439571256L,
ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(-75123905439571256L)));
}
[Test]
public void TestNegativeEnumNoTag()
{
Assert.AreEqual(10, CodedOutputStream.ComputeInt32Size(-2));
Assert.AreEqual(10, CodedOutputStream.ComputeEnumSize((int) SampleEnum.NegativeValue));
byte[] bytes = new byte[10];
CodedOutputStream output = new CodedOutputStream(bytes);
output.WriteEnum((int) SampleEnum.NegativeValue);
Assert.AreEqual(0, output.SpaceLeft);
Assert.AreEqual("FE-FF-FF-FF-FF-FF-FF-FF-FF-01", BitConverter.ToString(bytes));
}
[Test]
public void TestCodedInputOutputPosition()
{
byte[] content = new byte[110];
for (int i = 0; i < content.Length; i++)
content[i] = (byte)i;
byte[] child = new byte[120];
{
MemoryStream ms = new MemoryStream(child);
CodedOutputStream cout = new CodedOutputStream(ms, 20);
// Field 11: numeric value: 500
cout.WriteTag(11, WireFormat.WireType.Varint);
Assert.AreEqual(1, cout.Position);
cout.WriteInt32(500);
Assert.AreEqual(3, cout.Position);
//Field 12: length delimited 120 bytes
cout.WriteTag(12, WireFormat.WireType.LengthDelimited);
Assert.AreEqual(4, cout.Position);
cout.WriteBytes(ByteString.CopyFrom(content));
Assert.AreEqual(115, cout.Position);
// Field 13: fixed numeric value: 501
cout.WriteTag(13, WireFormat.WireType.Fixed32);
Assert.AreEqual(116, cout.Position);
cout.WriteSFixed32(501);
Assert.AreEqual(120, cout.Position);
cout.Flush();
}
byte[] bytes = new byte[130];
{
CodedOutputStream cout = new CodedOutputStream(bytes);
// Field 1: numeric value: 500
cout.WriteTag(1, WireFormat.WireType.Varint);
Assert.AreEqual(1, cout.Position);
cout.WriteInt32(500);
Assert.AreEqual(3, cout.Position);
//Field 2: length delimited 120 bytes
cout.WriteTag(2, WireFormat.WireType.LengthDelimited);
Assert.AreEqual(4, cout.Position);
cout.WriteBytes(ByteString.CopyFrom(child));
Assert.AreEqual(125, cout.Position);
// Field 3: fixed numeric value: 500
cout.WriteTag(3, WireFormat.WireType.Fixed32);
Assert.AreEqual(126, cout.Position);
cout.WriteSFixed32(501);
Assert.AreEqual(130, cout.Position);
cout.Flush();
}
// Now test Input stream:
{
CodedInputStream cin = new CodedInputStream(new MemoryStream(bytes), new byte[50], 0, 0, false);
Assert.AreEqual(0, cin.Position);
// Field 1:
uint tag = cin.ReadTag();
Assert.AreEqual(1, tag >> 3);
Assert.AreEqual(1, cin.Position);
Assert.AreEqual(500, cin.ReadInt32());
Assert.AreEqual(3, cin.Position);
//Field 2:
tag = cin.ReadTag();
Assert.AreEqual(2, tag >> 3);
Assert.AreEqual(4, cin.Position);
int childlen = cin.ReadLength();
Assert.AreEqual(120, childlen);
Assert.AreEqual(5, cin.Position);
int oldlimit = cin.PushLimit((int)childlen);
Assert.AreEqual(5, cin.Position);
// Now we are reading child message
{
// Field 11: numeric value: 500
tag = cin.ReadTag();
Assert.AreEqual(11, tag >> 3);
Assert.AreEqual(6, cin.Position);
Assert.AreEqual(500, cin.ReadInt32());
Assert.AreEqual(8, cin.Position);
//Field 12: length delimited 120 bytes
tag = cin.ReadTag();
Assert.AreEqual(12, tag >> 3);
Assert.AreEqual(9, cin.Position);
ByteString bstr = cin.ReadBytes();
Assert.AreEqual(110, bstr.Length);
Assert.AreEqual((byte) 109, bstr[109]);
Assert.AreEqual(120, cin.Position);
// Field 13: fixed numeric value: 501
tag = cin.ReadTag();
Assert.AreEqual(13, tag >> 3);
// ROK - Previously broken here, this returned 126 failing to account for bufferSizeAfterLimit
Assert.AreEqual(121, cin.Position);
Assert.AreEqual(501, cin.ReadSFixed32());
Assert.AreEqual(125, cin.Position);
Assert.IsTrue(cin.IsAtEnd);
}
cin.PopLimit(oldlimit);
Assert.AreEqual(125, cin.Position);
// Field 3: fixed numeric value: 501
tag = cin.ReadTag();
Assert.AreEqual(3, tag >> 3);
Assert.AreEqual(126, cin.Position);
Assert.AreEqual(501, cin.ReadSFixed32());
Assert.AreEqual(130, cin.Position);
Assert.IsTrue(cin.IsAtEnd);
}
}
[Test]
public void Dispose_DisposesUnderlyingStream()
{
var memoryStream = new MemoryStream();
Assert.IsTrue(memoryStream.CanWrite);
using (var cos = new CodedOutputStream(memoryStream))
{
cos.WriteRawBytes(new byte[] {0});
Assert.AreEqual(0, memoryStream.Position); // Not flushed yet
}
Assert.AreEqual(1, memoryStream.ToArray().Length); // Flushed data from CodedOutputStream to MemoryStream
Assert.IsFalse(memoryStream.CanWrite); // Disposed
}
[Test]
public void Dispose_WithLeaveOpen()
{
var memoryStream = new MemoryStream();
Assert.IsTrue(memoryStream.CanWrite);
using (var cos = new CodedOutputStream(memoryStream, true))
{
cos.WriteRawBytes(new byte[] {0});
Assert.AreEqual(0, memoryStream.Position); // Not flushed yet
}
Assert.AreEqual(1, memoryStream.Position); // Flushed data from CodedOutputStream to MemoryStream
Assert.IsTrue(memoryStream.CanWrite); // We left the stream open
}
}
}