Migrated test block 13 to Dart 2.0.

tests/corelib/list_as_map_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.
-
-import "package:expect/expect.dart";
-
-void testListMapCorrespondence(List list, Map map) {
-  Expect.equals(list.length, map.length);
-  for (int i = 0; i < list.length; i++) {
-    Expect.equals(list[i], map[i]);
-  }
-  Expect.isNull(map[list.length]);
-  Expect.isNull(map[-1]);
-
-  Iterable keys = map.keys;
-  Iterable values = map.values;
-  Expect.isFalse(keys is List);
-  Expect.isFalse(values is List);
-  Expect.equals(list.length, keys.length);
-  Expect.equals(list.length, values.length);
-  for (int i = 0; i < list.length; i++) {
-    Expect.equals(i, keys.elementAt(i));
-    Expect.equals(list[i], values.elementAt(i));
-  }
-
-  int forEachCount = 0;
-  map.forEach((key, value) {
-    Expect.equals(forEachCount, key);
-    Expect.equals(list[key], value);
-    forEachCount++;
-  });
-
-  for (int i = 0; i < list.length; i++) {
-    Expect.isTrue(map.containsKey(i));
-    Expect.isTrue(map.containsValue(list[i]));
-  }
-  Expect.isFalse(map.containsKey(-1));
-  Expect.isFalse(map.containsKey(list.length));
-
-  Expect.equals(list.length, forEachCount);
-
-  Expect.equals(list.isEmpty, map.isEmpty);
-}
-
-void testConstAsMap(List list) {
-  Map<int, dynamic> map = list.asMap();
-
-  testListMapCorrespondence(list, map);
-
-  Expect.throws(() => map[0] = 499, (e) => e is UnsupportedError);
-  Expect.throws(
-      () => map.putIfAbsent(0, () => 499), (e) => e is UnsupportedError);
-  Expect.throws(() => map.clear(), (e) => e is UnsupportedError);
-}
-
-void testFixedAsMap(List list) {
-  testConstAsMap(list);
-
-  Map<int, dynamic> map = list.asMap();
-
-  if (!list.isEmpty) {
-    list[0] = 499;
-    // Check again to make sure the map is backed by the list.
-    testListMapCorrespondence(list, map);
-  }
-}
-
-void testAsMap(List list) {
-  testFixedAsMap(list);
-
-  Map<int, dynamic> map = list.asMap();
-
-  Iterable keys = map.keys;
-  Iterable values = map.values;
-
-  list.add(42);
-  // Check again to make sure the map is backed by the list and that the
-  // length is not cached.
-  testListMapCorrespondence(list, map);
-  // Also check that the keys and values iterable from the map are backed by
-  // the list.
-  Expect.equals(list.length, keys.length);
-  Expect.equals(values.length, values.length);
-}
-
-main() {
-  testConstAsMap(const [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
-  testAsMap([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
-  List list = new List(10);
-  for (int i = 0; i < 10; i++) list[i] = i + 1;
-  testFixedAsMap(list);
-
-  testConstAsMap(const []);
-  testAsMap([]);
-  testFixedAsMap(new List(0));
-}