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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
using System.IO;
using Google.ProtocolBuffers.TestProtos;
using NUnit.Framework;
namespace Google.ProtocolBuffers {
[TestFixture]
public class CodedOutputStreamTest {
private static void AssertEqualBytes(byte[] a, byte[] b) {
Assert.AreEqual(ByteString.CopyFrom(a), ByteString.CopyFrom(b));
}
/// <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 = CodedOutputStream.CreateInstance(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 = CodedOutputStream.CreateInstance(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 =
CodedOutputStream.CreateInstance(rawOutput, bufferSize);
output.WriteRawVarint32((uint) value);
output.Flush();
Assert.AreEqual(data, rawOutput.ToArray());
}
{
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output = CodedOutputStream.CreateInstance(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 = CodedOutputStream.CreateInstance(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 = CodedOutputStream.CreateInstance(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 = CodedOutputStream.CreateInstance(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 = CodedOutputStream.CreateInstance(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() {
TestAllTypes message = TestUtil.GetAllSet();
byte[] rawBytes = message.ToByteArray();
AssertEqualBytes(TestUtil.GoldenMessage.ToByteArray(), rawBytes);
// Try different block sizes.
for (int blockSize = 1; blockSize < 256; blockSize *= 2) {
MemoryStream rawOutput = new MemoryStream();
CodedOutputStream output =
CodedOutputStream.CreateInstance(rawOutput, blockSize);
message.WriteTo(output);
output.Flush();
AssertEqualBytes(rawBytes, rawOutput.ToArray());
}
}
[Test]
public void EncodeZigZag32() {
Assert.AreEqual(0, CodedOutputStream.EncodeZigZag32( 0));
Assert.AreEqual(1, CodedOutputStream.EncodeZigZag32(-1));
Assert.AreEqual(2, CodedOutputStream.EncodeZigZag32( 1));
Assert.AreEqual(3, CodedOutputStream.EncodeZigZag32(-2));
Assert.AreEqual(0x7FFFFFFE, CodedOutputStream.EncodeZigZag32(0x3FFFFFFF));
Assert.AreEqual(0x7FFFFFFF, CodedOutputStream.EncodeZigZag32(unchecked((int)0xC0000000)));
Assert.AreEqual(0xFFFFFFFE, CodedOutputStream.EncodeZigZag32(0x7FFFFFFF));
Assert.AreEqual(0xFFFFFFFF, CodedOutputStream.EncodeZigZag32(unchecked((int)0x80000000)));
}
[Test]
public void EncodeZigZag64() {
Assert.AreEqual(0, CodedOutputStream.EncodeZigZag64( 0));
Assert.AreEqual(1, CodedOutputStream.EncodeZigZag64(-1));
Assert.AreEqual(2, CodedOutputStream.EncodeZigZag64( 1));
Assert.AreEqual(3, CodedOutputStream.EncodeZigZag64(-2));
Assert.AreEqual(0x000000007FFFFFFEL,
CodedOutputStream.EncodeZigZag64(unchecked((long)0x000000003FFFFFFFUL)));
Assert.AreEqual(0x000000007FFFFFFFL,
CodedOutputStream.EncodeZigZag64(unchecked((long)0xFFFFFFFFC0000000UL)));
Assert.AreEqual(0x00000000FFFFFFFEL,
CodedOutputStream.EncodeZigZag64(unchecked((long)0x000000007FFFFFFFUL)));
Assert.AreEqual(0x00000000FFFFFFFFL,
CodedOutputStream.EncodeZigZag64(unchecked((long)0xFFFFFFFF80000000UL)));
Assert.AreEqual(0xFFFFFFFFFFFFFFFEL,
CodedOutputStream.EncodeZigZag64(unchecked((long)0x7FFFFFFFFFFFFFFFUL)));
Assert.AreEqual(0xFFFFFFFFFFFFFFFFL,
CodedOutputStream.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, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(0)));
Assert.AreEqual(1, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(1)));
Assert.AreEqual(-1, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-1)));
Assert.AreEqual(14927, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(14927)));
Assert.AreEqual(-3612, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-3612)));
}
[Test]
public void RoundTripZigZag64() {
Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(0)));
Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(1)));
Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-1)));
Assert.AreEqual(14927, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(14927)));
Assert.AreEqual(-3612, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-3612)));
Assert.AreEqual(856912304801416L, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(856912304801416L)));
Assert.AreEqual(-75123905439571256L, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-75123905439571256L)));
}
}
}
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