@Test
public void Should_callNestedReceiver_WhenItExist()
        throws Exception {

    IMessageReceiver theReceiverMock = mock(IMessageReceiver.class);
    when(handlerFieldMock.in(same(argsMock))).thenReturn("theReceiver");
    when(mapMock.get(eq("theReceiver"))).thenReturn(theReceiverMock);
    new HandlerRoutingReceiver(mapMock).receive(messageProcessorMock);
    verify(theReceiverMock).receive(same(messageProcessorMock));
}