Aske Simon Christensen
de3cec3a47
This achieves the same thing (test that `hashCode` is not called), but avoids a costly timeout on failure. This drastically cuts down the total testing time for the language and corelib suites for dart2wasm (which intends not to implement a special case here, since it is going to be illegal in the future anyway). Change-Id: I040925ebd8271a5816c81bc16484c0a96626857d Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-debug-x64-try Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/244061 Commit-Queue: Aske Simon Christensen <askesc@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com> Reviewed-by: Lasse Nielsen <lrn@google.com>
42 lines
1.3 KiB
Dart
42 lines
1.3 KiB
Dart
// Copyright (c) 2021, 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';
|
|
|
|
/// Returns its argument.
|
|
///
|
|
/// Prevents static optimizations and inlining.
|
|
@pragma('vm:never-inline')
|
|
@pragma('dart2js:noInline')
|
|
dynamic getValueNonOptimized(dynamic x) {
|
|
// DateTime.now() cannot be predicted statically, never equal to 42.
|
|
if (DateTime.now().millisecondsSinceEpoch == 42) {
|
|
return getValueNonOptimized(2);
|
|
}
|
|
return x;
|
|
}
|
|
|
|
class Nasty {
|
|
final int n;
|
|
|
|
const Nasty(this.n);
|
|
|
|
int get hashCode {
|
|
throw "Evil hashCode";
|
|
}
|
|
}
|
|
|
|
main() {
|
|
// Test that when using an instance of a custom class as a key in a const Map,
|
|
// its hash code is computed as its identity hash, and even if the class
|
|
// overrides `hashCode`, that `hashCode` implementation is not called.
|
|
final map = const {1: 42, 'foo': 499, 2: 'bar', Nasty(1): 'baz'};
|
|
Expect.equals(42, map[getValueNonOptimized(1.0)]);
|
|
Expect.equals(
|
|
499, map[getValueNonOptimized(new String.fromCharCodes('foo'.runes))]);
|
|
Expect.equals('bar', map[getValueNonOptimized(2)]);
|
|
Expect.isNull(map[getValueNonOptimized(Nasty(1))]);
|
|
Expect.equals('baz', map[getValueNonOptimized(const Nasty(1))]);
|
|
}
|