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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>
83 lines
2 KiB
Dart
83 lines
2 KiB
Dart
// Copyright (c) 2011, 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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// Test that a final list literal is not expandable nor modifiable.
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class ConstListLiteralTest {
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static void testMain() {
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var list = const [4, 2, 3];
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Expect.equals(3, list.length);
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var exception = null;
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try {
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list.add(4);
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} on UnsupportedError catch (e) {
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exception = e;
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}
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Expect.equals(true, exception != null);
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Expect.equals(3, list.length);
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exception = null;
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exception = null;
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try {
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list.addAll([4, 5]);
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} on UnsupportedError catch (e) {
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exception = e;
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}
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Expect.equals(true, exception != null);
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Expect.equals(3, list.length);
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exception = null;
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try {
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list[0] = 0;
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} on UnsupportedError catch (e) {
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exception = e;
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}
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Expect.equals(true, exception != null);
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Expect.equals(3, list.length);
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exception = null;
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try {
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list.sort((a, b) => a - b);
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} on UnsupportedError catch (e) {
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exception = e;
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}
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Expect.equals(true, exception != null);
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Expect.equals(3, list.length);
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Expect.equals(4, list[0]);
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Expect.equals(2, list[1]);
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Expect.equals(3, list[2]);
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exception = null;
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try {
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list.setRange(0, 1, [1], 0);
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} on UnsupportedError catch (e) {
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exception = e;
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}
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Expect.equals(true, exception != null);
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Expect.equals(3, list.length);
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Expect.equals(4, list[0]);
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Expect.equals(2, list[1]);
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Expect.equals(3, list[2]);
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// Note: the next check is a regression test for dart2js. The immutable list
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// overrides the 'length' property of List, but relies on using the native
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// 'forEach' construct in Array. This test ensures that our strategy works
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// correctly.
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int x = 0;
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list.forEach((e) {
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x += e;
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});
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Expect.equals(9, x);
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}
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}
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main() {
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ConstListLiteralTest.testMain();
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}
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