Tidying up and extra tests.
This is mostly just making things internal instead of public, removing and reordering a bunch of code in CodedInputStream/CodedOutputStream, and generally tidying up.
diff --git a/csharp/src/ProtocolBuffers.Test/CodedInputStreamExtensions.cs b/csharp/src/ProtocolBuffers.Test/CodedInputStreamExtensions.cs
new file mode 100644
index 0000000..408c7cb
--- /dev/null
+++ b/csharp/src/ProtocolBuffers.Test/CodedInputStreamExtensions.cs
@@ -0,0 +1,54 @@
+#region Copyright notice and license
+// Protocol Buffers - Google's data interchange format
+// Copyright 2015 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// 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,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using NUnit.Framework;
+
+namespace Google.Protobuf
+{
+ internal static class CodedInputStreamExtensions
+ {
+ public static void AssertNextTag(this CodedInputStream input, uint expectedTag)
+ {
+ uint tag;
+ Assert.IsTrue(input.ReadTag(out tag));
+ Assert.AreEqual(expectedTag, tag);
+ }
+
+ public static T ReadMessage<T>(this CodedInputStream stream, MessageParser<T> parser)
+ where T : IMessage<T>
+ {
+ var message = parser.CreateTemplate();
+ stream.ReadMessage(message);
+ return message;
+ }
+ }
+}
