private ChannelSubsystem getMockedSubsystemChannel(final IoInputStream asyncOut, final IoOutputStream asyncIn) throws IOException {
final ChannelSubsystem subsystemChannel = mock(ChannelSubsystem.class);
+ doReturn("subsystemChannel").when(subsystemChannel).toString();
+
doNothing().when(subsystemChannel).setStreaming(any(ClientChannel.Streaming.class));
final OpenFuture openFuture = mock(OpenFuture.class);