@Test
  public void testTransformer() throws Exception {
    InputStream in = getClass().getResourceAsStream("/transformer-input-message.xml");

    MuleClient client = new MuleClient(muleContext);
    MuleMessage reply =
        client.send("vm://messageInput", new DefaultMuleMessage(in, client.getMuleContext()));

    assertNotNull(reply);
    assertNotNull(reply.getPayload());
    assertFalse(
        "The payload is a NullPayload",
        "<org.mule.transport.NullPayload></org.mule.transport.NullPayload>"
            .equals(reply.getPayload()));

    assertTrue(reportFile.exists());
  }