protobuf/csharp/src/ProtocolBuffers.Test/MessageStreamWriterTest.cs

#region Copyright notice and license

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://github.com/jskeet/dotnet-protobufs/
// Original C++/Java/Python code:
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#endregion

using System.IO;
using NUnit.Framework;
using NestedMessage = Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage;

namespace Google.ProtocolBuffers
{
    public class MessageStreamWriterTest
    {
        internal static readonly byte[] ThreeMessageData = new byte[]
                                                               {
                                                                   (1 << 3) | 2, 2,
                                                                   // Field 1, 2 bytes long (first message)
                                                                   (1 << 3) | 0, 5, // Field 1, value 5
                                                                   (1 << 3) | 2, 3,
                                                                   // Field 1, 3 bytes long (second message)
                                                                   (1 << 3) | 0, (1500 & 0x7f) | 0x80, 1500 >> 7,
                                                                   // Field 1, value 1500
                                                                   (1 << 3) | 2, 0, // Field 1, no data (third message)
                                                               };

        [Test]
        public void ThreeMessages()
        {
            NestedMessage message1 = new NestedMessage.Builder {Bb = 5}.Build();
            NestedMessage message2 = new NestedMessage.Builder {Bb = 1500}.Build();
            NestedMessage message3 = new NestedMessage.Builder().Build();

            byte[] data;
            using (MemoryStream stream = new MemoryStream())
            {
                MessageStreamWriter<NestedMessage> writer = new MessageStreamWriter<NestedMessage>(stream);
                writer.Write(message1);
                writer.Write(message2);
                writer.Write(message3);
                writer.Flush();
                data = stream.ToArray();
            }

            TestUtil.AssertEqualBytes(ThreeMessageData, data);
        }
    }
}