if ip == nil {
		t.Errorf("error parsing IP %q", ipstr)
		return false
	}
	return alloc.Has(ip)
}

func portIsAllocated(t *testing.T, alloc portallocator.Interface, port int32) bool {
	t.Helper()
	if port == 0 {
		t.Errorf("port is 0")
		return false
	}
	return alloc.Has(int(port))
}