public function testCheckAndSetItem()
{
$this->assertTrue($this->_storage->setItem('key', 'value'));
$token = null;
$this->assertEquals('value', $this->_storage->getItem('key', array('token' => &$token)));
$this->assertNotNull($token);
$this->assertTrue($this->_storage->checkAndSetItem($token, 'key', 'newValue'));
$this->assertFalse($this->_storage->checkAndSetItem($token, 'key', 'failedValue'));
$this->assertEquals('newValue', $this->_storage->getItem('key'));
}