Move generated test code to a seperate lib

csharp/generate_protos.sh

@@ -45,7 +45,7 @@ $PROTOC -Isrc --csharp_out=csharp/src/Google.Protobuf \
 # and old_extensions2.proto, which are generated with an older version
 # of protoc.
 $PROTOC -Isrc -Icsharp/protos \
-    --csharp_out=csharp/src/Google.Protobuf.Test/TestProtos \
+    --csharp_out=csharp/src/Google.Protobuf.Test.CodeGen \
     --descriptor_set_out=csharp/src/Google.Protobuf.Test/testprotos.pb \
     --include_source_info \
     --include_imports \

csharp/src/Google.Protobuf.Test.CodeGen/Google.Protobuf.Test.CodeGen.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>net451;netstandard1.0</TargetFrameworks>
+    <AssemblyOriginatorKeyFile>../../keys/Google.Protobuf.snk</AssemblyOriginatorKeyFile>
+    <SignAssembly>true</SignAssembly>
+    <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
+    <IsPackable>False</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Google.Protobuf\Google.Protobuf.csproj" />
+  </ItemGroup>
+
+</Project>

csharp/src/Google.Protobuf.Test/Google.Protobuf.Test.csproj

@@ -10,6 +10,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Google.Protobuf\Google.Protobuf.csproj" />
+    <ProjectReference Include="..\Google.Protobuf.Test.CodeGen\Google.Protobuf.Test.CodeGen.csproj"/>
   </ItemGroup>
 
   <ItemGroup>