def = new HTMLPurifier_AttrDef_URI_IPv4();
$this->assertDef('127.0.0.1'); // standard IPv4, loopback, non-routable
$this->assertDef('0.0.0.0'); // standard IPv4, unspecified, non-routable
$this->assertDef('255.255.255.255'); // standard IPv4
$this->assertDef('300.0.0.0', false); // standard IPv4, out of range
$this->assertDef('124.15.6.89/60', false); // standard IPv4, prefix not allowed
$this->assertDef('', false); // nothing
}
}