private void DoTestGenericRetval <T>(T expectedRetval)
{
var handler = CreateClass("MyService", "GenericRetval")(new[] { typeof(T) });
var retvalCodec = codecContainer.GetManualCodecFor <T>();
var expectedData = new byte[retvalCodec.CalculateSize(expectedRetval)];
fixed(byte *pData = expectedData)
{
var p = pData;
retvalCodec.Encode(ref p, expectedRetval);
}
service.GenericRetval <T>().ReturnsForAnyArgs(expectedRetval);
var result = handler.Handle(service, null, 0).Result;
var serviceCall = service.ReceivedCalls().Last();
Assert.That(serviceCall.GetMethodInfo(), Is.EqualTo(typeof(IGlobalService).GetMethod("GenericRetval").MakeGenericMethod(new[] { typeof(T) })));
Assert.That(result, Is.EquivalentTo(expectedData));
}