public function testGetSessionExclude()
{
$pc = new PageCache();
$result = $pc->getSessionExclude();
$this->assertEmpty($result);
$pc->sessionExclude(array(null, '2', 3, false, new \stdClass()));
$this->assertEquals(array(null, '2', 3, false, new \stdClass()), SessionHandler::getExcludeKeys());
}