assertEquals("example.com", IpAddressUtil.formatForUrl("example.com"));

        // Null
        assertNull(IpAddressUtil.formatForUrl(null));
    }

    @Test
    public void testGetUrlHost() throws UnknownHostException {
        // IPv4 localhost
        InetAddress ipv4Localhost = InetAddress.getByName("127.0.0.1");
        assertEquals("127.0.0.1", IpAddressUtil.getUrlHost(ipv4Localhost));