public function testReplace()
 {
     $list = new ArrayList(array(array('Key' => 1), $two = (object) array('Key' => 2), (object) array('Key' => 3)));
     $this->assertEquals(array('Key' => 1), $list[0]);
     $list->replace(array('Key' => 1), array('Replaced' => 1));
     $this->assertEquals(3, count($list));
     $this->assertEquals(array('Replaced' => 1), $list[0]);
     $this->assertEquals($two, $list[1]);
     $list->replace($two, array('Replaced' => 2));
     $this->assertEquals(3, count($list));
     $this->assertEquals(array('Replaced' => 2), $list[1]);
 }