public function testAcceptValueInvalidFormat()
{
$ft = $this->createFieldTypeUnderTest();
$ref = new ReflectionObject($ft);
$refMethod = $ref->getMethod('acceptValue');
$refMethod->setAccessible(true);
$ratingValue = new Value();
$ratingValue->isDisabled = 'Strings should not work.';
$refMethod->invoke($ft, $ratingValue);
}