mirror of
https://github.com/dart-lang/sdk
synced 2024-09-16 03:36:59 +00:00
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
54 lines
1.7 KiB
Dart
54 lines
1.7 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.
|
|
// Check that arrays from const array literals are immutable.
|
|
|
|
import "package:expect/expect.dart";
|
|
|
|
class ListLiteral3Test {
|
|
static const List<String> canonicalJoke = const ["knock", "knock"];
|
|
|
|
static testMain() {
|
|
List<String> joke = const ["knock", "knock"];
|
|
// Elements of canonical lists are canonicalized.
|
|
Expect.identical(joke, canonicalJoke);
|
|
Expect.identical(joke[0], joke[1]);
|
|
Expect.identical(joke[0], canonicalJoke[0]);
|
|
|
|
// Lists from literals are immutable.
|
|
Expect.throwsUnsupportedError(() => joke[0] = "sock");
|
|
Expect.identical(joke[0], joke[1]);
|
|
|
|
// Make sure lists allocated at runtime are mutable and are
|
|
// not canonicalized.
|
|
List<String> lame_joke = ["knock", "knock"]; // Invokes operator new.
|
|
Expect.identical(joke[1], lame_joke[1]);
|
|
// Operator new creates a mutable list.
|
|
Expect.equals(false, identical(joke, lame_joke));
|
|
lame_joke[1] = "who";
|
|
Expect.identical("who", lame_joke[1]);
|
|
|
|
// Elements of canonical lists are canonicalized.
|
|
List<List<int>> a = const <List<int>>[
|
|
const [1, 2],
|
|
const [1, 2]
|
|
];
|
|
Expect.identical(a[0], a[1]);
|
|
Expect.identical(a[0][0], a[1][0]);
|
|
Expect.throwsUnsupportedError(() => a[0][0] = 42);
|
|
|
|
List<List<double>> b = const [
|
|
const [1.0, 2.0],
|
|
const [1.0, 2.0]
|
|
];
|
|
Expect.identical(b[0], b[1]);
|
|
Expect.equals(true, b[0][0] == 1.0);
|
|
Expect.identical(b[0][0], b[1][0]);
|
|
Expect.throwsUnsupportedError(() => b[0][0] = 42.0);
|
|
}
|
|
}
|
|
|
|
main() {
|
|
ListLiteral3Test.testMain();
|
|
}
|