static final String LOTS_OF_DELTAS = Strings.repeat(DELTA, 62);

  private static final String ALMOST_TOO_MANY_LEVELS = Strings.repeat("a.", 127);

  private static final String ALMOST_TOO_LONG = Strings.repeat("aaaaa.", 40) + "1234567890.c";

  private static final ImmutableSet<String> VALID_NAME =
      ImmutableSet.of(
          "foo.com",
          "f-_-o.cOM",
          "f--1.com",
          "f11-1.com",
          "www",

	buffer   string
	delim    byte
	expected []string
	err      error
}{
	{"", 0, []string{""}, io.EOF},
	{"a\x00", 0, []string{"a\x00"}, nil},
	{"abbbaaaba", 'b', []string{"ab", "b", "b", "aaab"}, nil},
	{"hello\x01world", 1, []string{"hello\x01"}, nil},
	{"foo\nbar", 0, []string{"foo\nbar"}, io.EOF},
	{"alpha\nbeta\ngamma\n", '\n', []string{"alpha\n", "beta\n", "gamma\n"}, nil},

AA4E..AA4F    ; disallowed                             # NA   <reserved-AA4E>..<reserved-AA4F>
AA50..AA59    ; valid                                  # 5.1  CHAM DIGIT ZERO..CHAM DIGIT NINE
AA5A..AA5B    ; disallowed                             # NA   <reserved-AA5A>..<reserved-AA5B>
AA5C..AA5F    ; valid                  ;      ; NV8    # 5.1  CHAM PUNCTUATION SPIRAL..CHAM PUNCTUATION TRIPLE DANDA