Update charted to 0.4.8 and roll

packages/quiver/test/streams/collect_test.dart

-// Copyright 2014 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-library quiver.streams.collect_test;
-
-import 'dart:async';
-import 'dart:math';
-
-import 'package:test/test.dart';
-import 'package:quiver/streams.dart';
-
-main() {
-  group('collect', () {
-    test('should produce no events for no futures',
-        () => collect([]).toList().then((events) => expect(events, isEmpty)));
-
-    test('should produce events for future completions in input order', () {
-      var futures = new Iterable.generate(
-          5, (int i) => i.isEven ? new Future.value(i) : new Future.error(i));
-      var events = [];
-      var done = new Completer();
-
-      collect(futures).listen(events.add, onError: (i) {
-        events.add('e$i');
-      }, onDone: done.complete);
-      return Future.wait(futures).catchError((_) => done.future).then((_) {
-        expect(events, [0, 'e1', 2, 'e3', 4]);
-      });
-    });
-
-    test('should only advance iterator once '
-        'event for previous future is sent', () {
-      var eventCount = 0;
-      var maxParallel = 0;
-      var currentParallel = 0;
-      var done = new Completer();
-      var futures = new Iterable.generate(3, (_) {
-        maxParallel = max(++currentParallel, maxParallel);
-        return new Future.value();
-      });
-
-      var collected = collect(futures);
-
-      decrementParallel(_) {
-        eventCount++;
-        currentParallel--;
-      }
-
-      collected.listen(decrementParallel,
-          onError: decrementParallel, onDone: done.complete);
-      return done.future.then((_) {
-        expect(maxParallel, 1);
-        expect(eventCount, 3);
-      });
-    });
-  });
-}