/**
  * @return EmptyEnum
  */
 public static function getFieldsEnum()
 {
     return EmptyEnum::getInstance();
 }
 public function testEmptyEnum()
 {
     $enum = EmptyEnum::getInstance();
     $this->assertEquals(array(), $enum->getArrayCopy());
     $this->assertEquals(array(), $enum->getNames());
     $this->assertEquals(array(), $enum->getValues());
     $this->assertEquals(array(), $enum->getValuesMap());
 }