public function testConstructAndGetAndSet()
{
$array = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
$ah = new ArrayHelper($array);
// Make sure we are not using by reference
$this->assertEquals(10, $ah->pop());
$this->assertEquals(10, $ah->pop());
// Make sure we are not using by reference
$this->assertEquals(1, $ah->shift());
$this->assertEquals(1, $ah->shift());
$ah->setMutable(true);
$this->assertEquals(1, $ah->shift());
$this->assertEquals(2, $ah->shift());
$ah->unshift(2, 1);
$this->assertEquals(1, $ah->shift());
}