Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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243 lines
10 KiB
243 lines
10 KiB
using System.IO; |
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// Protocol Buffers - Google's data interchange format |
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// Copyright 2008 Google Inc. |
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// http://code.google.com/p/protobuf/ |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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using Google.ProtocolBuffers.TestProtos; |
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using NUnit.Framework; |
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namespace Google.ProtocolBuffers { |
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[TestFixture] |
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public class CodedOutputStreamTest { |
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private static void AssertEqualBytes(byte[] a, byte[] b) { |
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Assert.AreEqual(ByteString.CopyFrom(a), ByteString.CopyFrom(b)); |
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} |
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/// <summary> |
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/// Writes the given value using WriteRawVarint32() and WriteRawVarint64() and |
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/// checks that the result matches the given bytes |
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/// </summary> |
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private static void AssertWriteVarint(byte[] data, ulong value) { |
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// Only do 32-bit write if the value fits in 32 bits. |
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if ((value >> 32) == 0) { |
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MemoryStream rawOutput = new MemoryStream(); |
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CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); |
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output.WriteRawVarint32((uint) value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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// Also try computing size. |
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Assert.AreEqual(data.Length, CodedOutputStream.ComputeRawVarint32Size((uint) value)); |
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} |
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{ |
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MemoryStream rawOutput = new MemoryStream(); |
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CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); |
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output.WriteRawVarint64(value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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// Also try computing size. |
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Assert.AreEqual(data.Length, CodedOutputStream.ComputeRawVarint64Size(value)); |
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} |
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// Try different buffer sizes. |
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for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2) { |
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// Only do 32-bit write if the value fits in 32 bits. |
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if ((value >> 32) == 0) { |
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MemoryStream rawOutput = new MemoryStream(); |
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CodedOutputStream output = |
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CodedOutputStream.CreateInstance(rawOutput, bufferSize); |
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output.WriteRawVarint32((uint) value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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} |
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{ |
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MemoryStream rawOutput = new MemoryStream(); |
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CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput, bufferSize); |
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output.WriteRawVarint64(value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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} |
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} |
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} |
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/// <summary> |
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/// Tests WriteRawVarint32() and WriteRawVarint64() |
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/// </summary> |
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[Test] |
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public void WriteVarint() { |
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AssertWriteVarint(new byte[] {0x00}, 0); |
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AssertWriteVarint(new byte[] {0x01}, 1); |
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AssertWriteVarint(new byte[] {0x7f}, 127); |
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// 14882 |
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AssertWriteVarint(new byte[] {0xa2, 0x74}, (0x22 << 0) | (0x74 << 7)); |
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// 2961488830 |
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AssertWriteVarint(new byte[] {0xbe, 0xf7, 0x92, 0x84, 0x0b}, |
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(0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) | |
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(0x0bL << 28)); |
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// 64-bit |
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// 7256456126 |
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AssertWriteVarint(new byte[] {0xbe, 0xf7, 0x92, 0x84, 0x1b}, |
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(0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) | |
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(0x1bL << 28)); |
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// 41256202580718336 |
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AssertWriteVarint( |
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new byte[] {0x80, 0xe6, 0xeb, 0x9c, 0xc3, 0xc9, 0xa4, 0x49}, |
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(0x00 << 0) | (0x66 << 7) | (0x6b << 14) | (0x1c << 21) | |
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(0x43UL << 28) | (0x49L << 35) | (0x24UL << 42) | (0x49UL << 49)); |
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// 11964378330978735131 |
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AssertWriteVarint( |
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new byte[] {0x9b, 0xa8, 0xf9, 0xc2, 0xbb, 0xd6, 0x80, 0x85, 0xa6, 0x01}, |
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unchecked((ulong) |
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((0x1b << 0) | (0x28 << 7) | (0x79 << 14) | (0x42 << 21) | |
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(0x3bL << 28) | (0x56L << 35) | (0x00L << 42) | |
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(0x05L << 49) | (0x26L << 56) | (0x01L << 63)))); |
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} |
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/// <summary> |
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/// Parses the given bytes using WriteRawLittleEndian32() and checks |
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/// that the result matches the given value. |
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/// </summary> |
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private static void AssertWriteLittleEndian32(byte[] data, uint value) { |
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MemoryStream rawOutput = new MemoryStream(); |
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CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); |
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output.WriteRawLittleEndian32(value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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// Try different buffer sizes. |
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for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2) { |
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rawOutput = new MemoryStream(); |
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output = CodedOutputStream.CreateInstance(rawOutput, bufferSize); |
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output.WriteRawLittleEndian32(value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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} |
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} |
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/// <summary> |
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/// Parses the given bytes using WriteRawLittleEndian64() and checks |
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/// that the result matches the given value. |
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/// </summary> |
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private static void AssertWriteLittleEndian64(byte[] data, ulong value) { |
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MemoryStream rawOutput = new MemoryStream(); |
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CodedOutputStream output = CodedOutputStream.CreateInstance(rawOutput); |
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output.WriteRawLittleEndian64(value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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// Try different block sizes. |
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for (int blockSize = 1; blockSize <= 16; blockSize *= 2) { |
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rawOutput = new MemoryStream(); |
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output = CodedOutputStream.CreateInstance(rawOutput, blockSize); |
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output.WriteRawLittleEndian64(value); |
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output.Flush(); |
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Assert.AreEqual(data, rawOutput.ToArray()); |
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} |
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} |
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/// <summary> |
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/// Tests writeRawLittleEndian32() and writeRawLittleEndian64(). |
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/// </summary> |
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[Test] |
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public void WriteLittleEndian() { |
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AssertWriteLittleEndian32(new byte[] {0x78, 0x56, 0x34, 0x12}, 0x12345678); |
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AssertWriteLittleEndian32(new byte[] {0xf0, 0xde, 0xbc, 0x9a}, 0x9abcdef0); |
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AssertWriteLittleEndian64( |
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new byte[]{0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12}, |
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0x123456789abcdef0L); |
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AssertWriteLittleEndian64( |
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new byte[]{0x78, 0x56, 0x34, 0x12, 0xf0, 0xde, 0xbc, 0x9a}, |
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0x9abcdef012345678UL); |
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} |
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[Test] |
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public void WriteWholeMessage() { |
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TestAllTypes message = TestUtil.GetAllSet(); |
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byte[] rawBytes = message.ToByteArray(); |
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AssertEqualBytes(TestUtil.GoldenMessage.ToByteArray(), rawBytes); |
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// Try different block sizes. |
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for (int blockSize = 1; blockSize < 256; blockSize *= 2) { |
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MemoryStream rawOutput = new MemoryStream(); |
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CodedOutputStream output = |
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CodedOutputStream.CreateInstance(rawOutput, blockSize); |
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message.WriteTo(output); |
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output.Flush(); |
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AssertEqualBytes(rawBytes, rawOutput.ToArray()); |
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} |
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} |
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[Test] |
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public void EncodeZigZag32() { |
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Assert.AreEqual(0, CodedOutputStream.EncodeZigZag32( 0)); |
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Assert.AreEqual(1, CodedOutputStream.EncodeZigZag32(-1)); |
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Assert.AreEqual(2, CodedOutputStream.EncodeZigZag32( 1)); |
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Assert.AreEqual(3, CodedOutputStream.EncodeZigZag32(-2)); |
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Assert.AreEqual(0x7FFFFFFE, CodedOutputStream.EncodeZigZag32(0x3FFFFFFF)); |
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Assert.AreEqual(0x7FFFFFFF, CodedOutputStream.EncodeZigZag32(unchecked((int)0xC0000000))); |
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Assert.AreEqual(0xFFFFFFFE, CodedOutputStream.EncodeZigZag32(0x7FFFFFFF)); |
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Assert.AreEqual(0xFFFFFFFF, CodedOutputStream.EncodeZigZag32(unchecked((int)0x80000000))); |
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} |
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[Test] |
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public void EncodeZigZag64() { |
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Assert.AreEqual(0, CodedOutputStream.EncodeZigZag64( 0)); |
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Assert.AreEqual(1, CodedOutputStream.EncodeZigZag64(-1)); |
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Assert.AreEqual(2, CodedOutputStream.EncodeZigZag64( 1)); |
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Assert.AreEqual(3, CodedOutputStream.EncodeZigZag64(-2)); |
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Assert.AreEqual(0x000000007FFFFFFEL, |
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CodedOutputStream.EncodeZigZag64(unchecked((long)0x000000003FFFFFFFUL))); |
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Assert.AreEqual(0x000000007FFFFFFFL, |
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CodedOutputStream.EncodeZigZag64(unchecked((long)0xFFFFFFFFC0000000UL))); |
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Assert.AreEqual(0x00000000FFFFFFFEL, |
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CodedOutputStream.EncodeZigZag64(unchecked((long)0x000000007FFFFFFFUL))); |
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Assert.AreEqual(0x00000000FFFFFFFFL, |
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CodedOutputStream.EncodeZigZag64(unchecked((long)0xFFFFFFFF80000000UL))); |
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Assert.AreEqual(0xFFFFFFFFFFFFFFFEL, |
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CodedOutputStream.EncodeZigZag64(unchecked((long)0x7FFFFFFFFFFFFFFFUL))); |
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Assert.AreEqual(0xFFFFFFFFFFFFFFFFL, |
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CodedOutputStream.EncodeZigZag64(unchecked((long)0x8000000000000000UL))); |
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} |
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[Test] |
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public void RoundTripZigZag32() { |
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// Some easier-to-verify round-trip tests. The inputs (other than 0, 1, -1) |
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// were chosen semi-randomly via keyboard bashing. |
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Assert.AreEqual(0, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(0))); |
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Assert.AreEqual(1, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(1))); |
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Assert.AreEqual(-1, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-1))); |
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Assert.AreEqual(14927, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(14927))); |
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Assert.AreEqual(-3612, CodedInputStream.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-3612))); |
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} |
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[Test] |
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public void RoundTripZigZag64() { |
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Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(0))); |
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Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(1))); |
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Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-1))); |
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Assert.AreEqual(14927, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(14927))); |
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Assert.AreEqual(-3612, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-3612))); |
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Assert.AreEqual(856912304801416L, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(856912304801416L))); |
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Assert.AreEqual(-75123905439571256L, CodedInputStream.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-75123905439571256L))); |
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} |
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} |
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}
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