pkg/shelf: case-insensitive headers, cleaner Request ctor, a lot more tests

pkg/scheduled_test/lib/scheduled_test.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.
 
 // TODO(nweiz): Add support for calling [schedule] while the schedule is already
 // running.
 // TODO(nweiz): Port the non-Pub-specific scheduled test libraries from Pub.
 /// A package for writing readable tests of asynchronous behavior.
 ///
 /// ## Installing ##
@@ skipping 178 matching lines @@
 /// [pkg]: http://pub.dartlang.org/packages/scheduled_test
 library scheduled_test;
 
 import 'dart:async';
 
 import 'package:stack_trace/stack_trace.dart';
 import 'package:unittest/unittest.dart' as unittest;
 
 import 'src/schedule.dart';
 import 'src/schedule_error.dart';
-import 'src/utils.dart';
 
 export 'package:unittest/unittest.dart' hide
     test, solo_test, group, setUp, tearDown, completes, completion;
 
 export 'src/schedule.dart';
 export 'src/schedule_error.dart';
 export 'src/scheduled_future_matchers.dart';
 export 'src/task.dart';
 
 /// The [Schedule] for the current test. This is used to add new tasks and
@@ skipping 170 matching lines @@
 /// [description] provides an optional description of the future, which is
 /// used when generating error messages.
 Future wrapFuture(Future future, [String description]) {
   if (currentSchedule == null) {
     throw new StateError("Unexpected call to wrapFuture with no current "
         "schedule.");
   }
 
   return currentSchedule.wrapFuture(future, description);
 }