Migrated test block 16 to Dart 2.0.

tests/corelib/map_from_iterables_test.dart

-// Copyright (c) 2011, 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:expect/expect.dart";
-import 'dart:collection';
-
-main() {
-  positiveTest();
-  emptyMapTest();
-  fewerKeysIterableTest();
-  fewerValuesIterableTest();
-  equalElementsTest();
-  genericTypeTest();
-}
-
-void positiveTest() {
-  var map = new Map.fromIterables([1, 2, 3], ["one", "two", "three"]);
-  Expect.isTrue(map is Map);
-  Expect.isTrue(map is LinkedHashMap);
-
-  Expect.equals(3, map.length);
-  Expect.equals(3, map.keys.length);
-  Expect.equals(3, map.values.length);
-
-  Expect.equals("one", map[1]);
-  Expect.equals("two", map[2]);
-  Expect.equals("three", map[3]);
-}
-
-void emptyMapTest() {
-  var map = new Map.fromIterables([], []);
-  Expect.isTrue(map is Map);
-  Expect.isTrue(map is LinkedHashMap);
-
-  Expect.equals(0, map.length);
-  Expect.equals(0, map.keys.length);
-  Expect.equals(0, map.values.length);
-}
-
-void fewerValuesIterableTest() {
-  Expect.throws(() => new Map.fromIterables([1, 2], [0]));
-}
-
-void fewerKeysIterableTest() {
-  Expect.throws(() => new Map.fromIterables([1], [0, 2]));
-}
-
-void equalElementsTest() {
-  var map = new Map.fromIterables([1, 2, 2], ["one", "two", "three"]);
-  Expect.isTrue(map is Map);
-  Expect.isTrue(map is LinkedHashMap);
-
-  Expect.equals(2, map.length);
-  Expect.equals(2, map.keys.length);
-  Expect.equals(2, map.values.length);
-
-  Expect.equals("one", map[1]);
-  Expect.equals("three", map[2]);
-}
-
-void genericTypeTest() {
-  var map =
-      new Map<int, String>.fromIterables([1, 2, 3], ["one", "two", "three"]);
-  Expect.isTrue(map is Map<int, String>);
-
-  // Make sure it is not just Map<dynamic, dynamic>.
-  Expect.isFalse(map is Map<String, dynamic>);
-  Expect.isFalse(map is Map<dynamic, int>);
-
-  Expect.equals(3, map.length);
-  Expect.equals(3, map.keys.length);
-  Expect.equals(3, map.values.length);
-
-  Expect.equals("one", map[1]);
-  Expect.equals("two", map[2]);
-  Expect.equals("three", map[3]);
-}