### Question:
TextAreaItem extends FormItem<String> { @Override public boolean validate(String value) { return !(isRequired() && value.trim().equals("")); } TextAreaItem(String name, String title);  TextAreaItem(String name, String title, boolean required); @Override Element getInputElement(); void setVisibleLines(int lines); @Override Widget asWidget(); @Override String getValue(); @Override void resetMetaData(); @Override void setValue(String value); @Override void setEnabled(boolean b); @Override void setErroneous(boolean b); @Override boolean validate(String value); @Override void clearValue();  }### Answer:
@Test public void testValidate1() { TextAreaItem tai = new TextAreaItem("a", "b"); tai.setRequired(true); Assert.assertFalse(tai.validate("")); Assert.assertTrue(tai.validate("hi ho")); Assert.assertTrue(tai.validate("hi\nho")); }
@Test public void testValidate2() { TextAreaItem tai = new TextAreaItem("a", "b"); tai.setRequired(false); Assert.assertTrue(tai.validate("")); Assert.assertTrue(tai.validate("hi ho")); Assert.assertTrue(tai.validate("hi\nho")); }