@Test
public void extractBindingResultErrors() throws Exception {
BindingResult bindingResult = new MapBindingResult(Collections.singletonMap("a",
"b"), "objectName");
bindingResult.addError(new ObjectError("c", "d"));
BindException ex = new BindException(bindingResult);
this.request.setAttribute("javax.servlet.error.exception", ex);
Map<String, Object> attributes = this.errorAttributes.getErrorAttributes(
this.requestAttributes, false);
assertThat(attributes.get("message"), equalTo((Object) ("Validation failed for "