public function setUp()
{
parent::setUp();
$this->list = ['value1', 'value2', 'value3', 'value4'];
$this->listIterator = new ArrayIterator($this->list);
$this->hash = ['k1' => 'val1', 'k2' => 'val2', 'k3' => 'val3'];
$this->hashIterator = new ArrayIterator($this->hash);
}