Disallow non-hyphenated-identifier tag names.

lib/src/utils.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.utils;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:math' as math;
 
@@ skipping 42 matching lines @@
 /// This is useful for running test files directly and skipping tests as
 /// appropriate. The only OS-specific information we have is the current path,
 /// which we try to use to figure out the OS.
 final OperatingSystem currentOSGuess = (() {
   if (p.style == p.Style.url) return OperatingSystem.none;
   if (p.style == p.Style.windows) return OperatingSystem.windows;
   if (_macOSDirectories.any(p.current.startsWith)) return OperatingSystem.macOS;
   return OperatingSystem.linux;
 })();
 
+/// A regular expression matching a hyphenated identifier.
+///
+/// This is like a standard Dart identifier, except that it can also contain
+/// hyphens.
+final hyphenatedIdentifier = new RegExp(r"[a-zA-Z_-][a-zA-Z0-9_-]*");
+
+/// Like [hyphenatedIdentifier], but anchored so that it must match the entire
+/// string.
+final anchoredHyphenatedIdentifier =
+    new RegExp("^${hyphenatedIdentifier.pattern}\$");
+
 /// A pair of values.
 class Pair<E, F> {
   E first;
   F last;
 
   Pair(this.first, this.last);
 
   String toString() => '($first, $last)';
 
   bool operator==(other) {
@@ skipping 332 matching lines @@
       urlSafe: urlSafe, addLineSeparator: addLineSeparator);
 }
 
 /// Returns middleware that nests all requests beneath the URL prefix [beneath].
 shelf.Middleware nestingMiddleware(String beneath) {
   return (handler) {
     var pathHandler = new PathHandler()..add(beneath, handler);
     return pathHandler.handler;
   };
 }