How to use

setPath

method

in

org.springframework.web.servlet.tags.form.ErrorsTag

@Override
@SuppressWarnings("serial")
protected void onSetUp() {
  this.tag = new ErrorsTag() {
    @Override
    protected TagWriter createTagWriter() {
      return new TagWriter(getWriter());
    }
  };
  this.tag.setPath("name");
  this.tag.setParent(getFormTag());
  this.tag.setPageContext(getPageContext());
}

@Test
public void specificPathMatchesSpecificFieldOnly() throws Exception {
  this.tag.setPath("name");
  Errors errors = new BeanPropertyBindingResult(new TestBean(), "COMMAND_NAME");
  errors.reject("some.code", "object error");
  errors.rejectValue("name", "some.code", "field error");
  exposeBindingResult(errors);
  this.tag.doStartTag();
  assertNotNull(getPageContext().getAttribute(ErrorsTag.MESSAGES_ATTRIBUTE));
  this.tag.doEndTag();
  String output = getOutput();
  assertTrue(output.contains("id=\"name.errors\""));
  assertFalse(output.contains("object error"));
  assertTrue(output.contains("field error"));
}

@Test
public void starMatchesAllErrors() throws Exception {
  this.tag.setPath("*");
  Errors errors = new BeanPropertyBindingResult(new TestBean(), "COMMAND_NAME");
  errors.reject("some.code", "object error");
  errors.rejectValue("name", "some.code", "field error");
  exposeBindingResult(errors);
  this.tag.doStartTag();
  assertNotNull(getPageContext().getAttribute(ErrorsTag.MESSAGES_ATTRIBUTE));
  this.tag.doEndTag();
  String output = getOutput();
  assertTrue(output.contains("id=\"testBean.errors\""));
  assertTrue(output.contains("object error"));
  assertTrue(output.contains("field error"));
}

/**
 * https://jira.spring.io/browse/SPR-4005
 */
@Test
public void omittedPathMatchesObjectErrorsOnly() throws Exception {
  this.tag.setPath(null);
  Errors errors = new BeanPropertyBindingResult(new TestBean(), "COMMAND_NAME");
  errors.reject("some.code", "object error");
  errors.rejectValue("name", "some.code", "field error");
  exposeBindingResult(errors);
  this.tag.doStartTag();
  assertNotNull(getPageContext().getAttribute(ErrorsTag.MESSAGES_ATTRIBUTE));
  this.tag.doEndTag();
  String output = getOutput();
  assertTrue(output.contains("id=\"testBean.errors\""));
  assertTrue(output.contains("object error"));
  assertFalse(output.contains("field error"));
}

errorsTag.setPath( path );

errorsTag.setParent( this );
errorsTag.setPageContext( pageContext );
errorsTag.setPath( path );
errorsTag.doStartTag();
JspWriter out = pageContext.pushBody();