Collections\Collection::getIterator PHP Метод

    public function getIterator()
    {
        return new ArrayIterator($this->items);
    }

 public function testIterator()
 {
     $col = new Collection('TestClassA');
     $iterator = $col->getIterator();
     $class = get_class($iterator);
     $this->assertEquals($class, "ArrayIterator");
 }