assertEquals(1, rateLimitHelper.getBlockedIpCount());

        rateLimitHelper.unblockIp("192.168.1.100");
        assertEquals(0, rateLimitHelper.getBlockedIpCount());
    }

    @Test
    public void test_cleanup() {
        rateLimitHelper.blockIp("192.168.1.100", 1L);
        assertEquals(1, rateLimitHelper.getBlockedIpCount());

        // Guava Cache handles expiration automatically

        assertSame(thumbnailJob, result);
        assertEquals(4, thumbnailJob.numOfThreads);
    }

    // Test cleanup setter
    @Test
    public void test_cleanup() {
        assertFalse(thumbnailJob.cleanup);

        GenerateThumbnailJob result = thumbnailJob.cleanup();

        assertSame(thumbnailJob, result);
        assertTrue(thumbnailJob.cleanup);
    }