for _, val := range goodValues {
		if msgs := IsValidPortName(val); len(msgs) != 0 {
			t.Errorf("expected true for %q: %v", val, msgs)
		}
	}

	badValues := []string{"longerthan15characters", "", strings.Repeat("a", 16), "12345", "1-2-3-4", "-begin", "end-", "two--hyphens", "whois++"}
	for _, val := range badValues {
		if msgs := IsValidPortName(val); len(msgs) == 0 {
			t.Errorf("expected false for %q", val)