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TEST=ci Bug: Contributes to https://github.com/dart-lang/sdk/issues/49529 Change-Id: Ic129ef2d89f625d9ec6a7a1c301cffddd60b2ff7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/258920 Reviewed-by: Lasse Nielsen <lrn@google.com> Commit-Queue: Michael Thomsen <mit@google.com> Reviewed-by: Slava Egorov <vegorov@google.com>
98 lines
2.6 KiB
Dart
98 lines
2.6 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.9
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import "package:expect/expect.dart";
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void testListMapCorrespondence(List list, Map map) {
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Expect.equals(list.length, map.length);
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for (int i = 0; i < list.length; i++) {
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Expect.equals(list[i], map[i]);
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}
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Expect.isNull(map[list.length]);
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Expect.isNull(map[-1]);
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Iterable keys = map.keys;
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Iterable values = map.values;
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Expect.isFalse(keys is List);
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Expect.isFalse(values is List);
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Expect.equals(list.length, keys.length);
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Expect.equals(list.length, values.length);
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for (int i = 0; i < list.length; i++) {
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Expect.equals(i, keys.elementAt(i));
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Expect.equals(list[i], values.elementAt(i));
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}
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int forEachCount = 0;
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map.forEach((key, value) {
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Expect.equals(forEachCount, key);
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Expect.equals(list[key], value);
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forEachCount++;
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});
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for (int i = 0; i < list.length; i++) {
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Expect.isTrue(map.containsKey(i));
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Expect.isTrue(map.containsValue(list[i]));
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}
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Expect.isFalse(map.containsKey(-1));
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Expect.isFalse(map.containsKey(list.length));
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Expect.equals(list.length, forEachCount);
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Expect.equals(list.isEmpty, map.isEmpty);
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}
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void testConstAsMap(List list) {
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Map<int, dynamic> map = list.asMap();
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testListMapCorrespondence(list, map);
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Expect.throwsUnsupportedError(() => map[0] = 499);
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Expect.throwsUnsupportedError(() => map.putIfAbsent(0, () => 499));
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Expect.throwsUnsupportedError(() => map.clear());
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}
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void testFixedAsMap(List list) {
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testConstAsMap(list);
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Map<int, dynamic> map = list.asMap();
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if (!list.isEmpty) {
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list[0] = 499;
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// Check again to make sure the map is backed by the list.
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testListMapCorrespondence(list, map);
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}
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}
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void testAsMap(List list) {
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testFixedAsMap(list);
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Map<int, dynamic> map = list.asMap();
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Iterable keys = map.keys;
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Iterable values = map.values;
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list.add(42);
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// Check again to make sure the map is backed by the list and that the
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// length is not cached.
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testListMapCorrespondence(list, map);
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// Also check that the keys and values iterable from the map are backed by
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// the list.
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Expect.equals(list.length, keys.length);
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Expect.equals(values.length, values.length);
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}
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main() {
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testConstAsMap(const [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
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testAsMap([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
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List list = new List.filled(10, null);
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for (int i = 0; i < 10; i++) list[i] = i + 1;
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testFixedAsMap(list);
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testConstAsMap(const []);
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testAsMap([]);
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testFixedAsMap(new List.filled(0, null));
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}
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