public function testUpdateDuration()
{
$this->obj->put('fruit', 'apple', 30);
$result = $this->obj->getCachedObject('fruit');
$this->assertEquals(30, $result->getDuration());
$this->obj->updateDuration('fruit', 70);
$result = $this->obj->getCachedObject('fruit');
$this->assertEquals(70, $result->getDuration());
$result = $this->obj->get('fruit');
$this->assertEquals('apple', $result);
}
