Asserts that a field does not exist with the given name or ID.
$field: Name or ID of field to assert.
$message: (optional) Message to display.
$group: The group this message belongs to.
TRUE on pass, FALSE on fail.
protected function assertNoField($field, $message = '', $group = 'Other') {
return $this
->assertNoFieldByXPath($this
->constructFieldXpath('name', $field) . '|' . $this
->constructFieldXpath('id', $field), NULL, $message, $group);
}