mirror of
https://github.com/dart-lang/sdk
synced 2024-09-19 14:32:49 +00:00
b101a7d002
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
53 lines
1.4 KiB
Dart
53 lines
1.4 KiB
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.
|
|
|
|
// @dart = 2.9
|
|
|
|
import "package:expect/expect.dart";
|
|
|
|
class ListIteratorsTest {
|
|
static void checkListIterator(List a) {
|
|
Iterator it = a.iterator;
|
|
Expect.isNull(it.current);
|
|
for (int i = 0; i < a.length; i++) {
|
|
Expect.isTrue(it.moveNext());
|
|
var elem = it.current;
|
|
Expect.equals(a[i], elem);
|
|
}
|
|
Expect.isFalse(it.moveNext());
|
|
Expect.isNull(it.current);
|
|
}
|
|
|
|
static testMain() {
|
|
checkListIterator([]);
|
|
checkListIterator([1, 2]);
|
|
checkListIterator(new List(0));
|
|
checkListIterator(new List(10));
|
|
checkListIterator(new List());
|
|
List g = new List();
|
|
g.addAll([1, 2, 3]);
|
|
checkListIterator(g);
|
|
|
|
// This is mostly undefined behavior.
|
|
Iterator it = g.iterator;
|
|
Expect.isTrue(it.moveNext());
|
|
Expect.equals(1, it.current);
|
|
Expect.isTrue(it.moveNext());
|
|
g[1] = 49;
|
|
// The iterator keeps the last value.
|
|
Expect.equals(2, it.current);
|
|
Expect.isTrue(it.moveNext());
|
|
g.removeLast();
|
|
// The iterator keeps the last value.
|
|
Expect.equals(3, it.current);
|
|
Expect.throws(it.moveNext, (e) => e is ConcurrentModificationError);
|
|
// No progress when throwing.
|
|
Expect.equals(3, it.current);
|
|
}
|
|
}
|
|
|
|
main() {
|
|
ListIteratorsTest.testMain();
|
|
}
|