@Test
public void customConversionServiceFailure() throws Exception {
DefaultMessageHandlerMethodFactory instance = createInstance();
GenericConversionService conversionService = new GenericConversionService();
assertFalse("conversion service should fail to convert payload",
conversionService.canConvert(Integer.class, String.class));
instance.setConversionService(conversionService);
instance.afterPropertiesSet();
InvocableHandlerMethod invocableHandlerMethod =
createInvocableHandlerMethod(instance, "simpleString", String.class);