Support an @OnPlatform annotation.

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:math' as math;
 
 import 'package:crypto/crypto.dart';
@@ skipping 33 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 pair of values.
+class Pair<E, F> {
+  E first;
+  F last;
+
+  Pair(this.first, this.last);
+
+  String toString() => '($first, $last)';
+
+  bool operator==(other) {
+    if (other is! Pair) return false;
+    return other.first == first && other.last == last;
+  }
+
+  int get hashCode => first.hashCode ^ last.hashCode;
+}
+
 /// Get a string description of an exception.
 ///
 /// Many exceptions include the exception class name at the beginning of their
 /// [toString], so we remove that if it exists.
 String getErrorMessage(error) =>
   error.toString().replaceFirst(_exceptionPrefix, '');
 
 /// Indent each line in [str] by two spaces.
 String indent(String str) =>
     str.replaceAll(new RegExp("^", multiLine: true), "  ");
@@ skipping 223 matching lines @@
   }
 }
 
 /// 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;
   };
 }