public function testIsReversing()
 {
     $string = new String('Lorem ipsum Dolor amet lore');
     $result = $string->reverse();
     $this->assertInstanceOf('Simple\\Type\\String', $result);
     $this->assertEquals('erol tema roloD muspi meroL', $result->toString());
     $normal = $result->reverse();
     $this->assertInstanceOf('Simple\\Type\\String', $normal);
     $this->assertEquals('Lorem ipsum Dolor amet lore', $normal->toString());
 }