errs = append(errs, "must contain only alpha-numeric characters (a-z, 0-9), and hyphens (-)")
	}
	if !portNameOneLetterRegexp.MatchString(port) {
		errs = append(errs, "must contain at least one letter (a-z)")
	}
	if strings.Contains(port, "--") {
		errs = append(errs, "must not contain consecutive hyphens")
	}
	if len(port) > 0 && (port[0] == '-' || port[len(port)-1] == '-') {

			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)
		}
	}
}

func TestIsQualifiedName(t *testing.T) {

}

// ValidateLabels sets whether to check the mandatory label validation criteria
// as defined in Section 5.4 of RFC 5891. This includes testing for correct use
// of hyphens ('-'), normalization, validity of runes, and the context rules.
// In particular, ValidateLabels also sets the CheckHyphens and CheckJoiners flags
// in UTS #46.
func ValidateLabels(enable bool) Option {

}

// ValidateLabels sets whether to check the mandatory label validation criteria
// as defined in Section 5.4 of RFC 5891. This includes testing for correct use
// of hyphens ('-'), normalization, validity of runes, and the context rules.
// In particular, ValidateLabels also sets the CheckHyphens and CheckJoiners flags
// in UTS #46.
func ValidateLabels(enable bool) Option {

		}
	}
	return nil, 0, false
}

func parseTagName(s string, i int) (string, int, bool) {
	// “A tag name consists of an ASCII letter followed by zero or more ASCII letters, digits, or hyphens (-).”
	if i < len(s) && isLetter(s[i]) {
		j := i + 1
		for j < len(s) && isLDH(s[j]) {
			j++
		}
		return s[i:j], j, true
	}
	return "", 0, false
}

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    background: #2d2d2d
}

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					Name:     utilpointer.String("http"),
					Protocol: protocolPtr(api.ProtocolTCP),
				}},
				Endpoints: []discovery.Endpoint{{
					Addresses: []string{"foo.example.com", "example.com", "example.com.", "hyphens-are-good.example.com"},
					Hostname:  utilpointer.String("valid-123"),
				}},
			},
		},
		"all-protocols": {
			expectedErrors: 0,
			endpointSlice: &discovery.EndpointSlice{
				ObjectMeta:  standardMeta,

// where n is the length of a prefix guaranteed not to be acceptable
// to any future call to parseValidDomain.
//
// “A valid domain consists of segments of alphanumeric characters,
// underscores (_) and hyphens (-) separated by periods (.).
// There must be at least one period, and no underscores may be
// present in the last two segments of the domain.”
//
// The spec does not spell out whether segments can be empty.

	// starts with a /, and a machine-parseable unit. The name may contain any valid Unicode
	// codepoint in between / characters, but by convention will try to stick to lowercase
	// characters and hyphens. An example of such a path might be "/memory/heap/free".
	//
	// The unit is by convention a series of lowercase English unit names (singular or plural)

// characters long, and it must be a sequence of one or more labels
// separated by periods. Each label can contain lowercase ascii
// letters, decimal digits and hyphens, but must not begin or end with
// a hyphen. See:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/BucketRestrictions.html
func IsValidBucketName(bucket string) bool {
	// Special case when bucket is equal to one of the meta buckets.