Update charted to 0.4.8 and roll

packages/collection/test/combined_wrapper/list_test.dart

+// Copyright (c) 2017, 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.
+
+import 'package:collection/collection.dart';
+import 'package:test/test.dart';
+
+import '../unmodifiable_collection_test.dart' as common;
+
+void main() {
+  var list1 = [1, 2, 3];
+  var list2 = [4, 5, 6];
+  var list3 = [7, 8, 9];
+  var concat = []..addAll(list1)..addAll(list2)..addAll(list3);
+
+  // In every way possible this should test the same as an UnmodifiableListView.
+  common.testUnmodifiableList(
+      concat, new CombinedListView([list1, list2, list3]), 'combineLists');
+
+  common.testUnmodifiableList(concat,
+      new CombinedListView([list1, [], list2, [], list3, []]), 'combineLists');
+
+  test('should function as an empty list when no lists are passed', () {
+    var empty = new CombinedListView([]);
+    expect(empty, isEmpty);
+    expect(empty.length, 0);
+    expect(() => empty[0], throwsRangeError);
+  });
+
+  test('should function as an empty list when only empty lists are passed', () {
+    var empty = new CombinedListView([[], [], []]);
+    expect(empty, isEmpty);
+    expect(empty.length, 0);
+    expect(() => empty[0], throwsRangeError);
+  });
+
+  test('should reflect underlying changes back to the combined list', () {
+    var backing1 = <int>[];
+    var backing2 = <int>[];
+    var combined = new CombinedListView([backing1, backing2]);
+    expect(combined, isEmpty);
+    backing1.addAll(list1);
+    expect(combined, list1);
+    backing2.addAll(list2);
+    expect(combined, backing1.toList()..addAll(backing2));
+  });
+
+  test('should reflect underlying changes from the list of lists', () {
+    var listOfLists = <List<int>>[];
+    var combined = new CombinedListView(listOfLists);
+    expect(combined, isEmpty);
+    listOfLists.add(list1);
+    expect(combined, list1);
+    listOfLists.add(list2);
+    expect(combined, []..addAll(list1)..addAll(list2));
+    listOfLists.clear();
+    expect(combined, isEmpty);
+  });
+
+  test('should reflect underlying changes with a single list', () {
+    var backing1 = <int>[];
+    var combined = new CombinedListView([backing1]);
+    expect(combined, isEmpty);
+    backing1.addAll(list1);
+    expect(combined, list1);
+  });
+}