lithium\tests\cases\storage\cache\adapter\FileTest::testExpiredRead PHP Method

    public function testExpiredRead()
    {
        $key = 'expired_key';
        $keys = array($key);
        $time = time() + 1;
        $path = Libraries::get(true, 'resources') . "/tmp/cache/{$key}";
        file_put_contents($path, "{:expiry:{$time}}\ndata");
        $this->assertFileExists($path);
        sleep(2);
        $expected = array();
        $result = $this->File->read($keys);
        $this->assertIdentical($expected, $result);
    }