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a5d4e010af
We were lacking tests for doing a `null` lookup in const maps and sets. Also, we were lacking tests for having type literals with user-defined classes in const maps and sets. Bug: https://github.com/dart-lang/sdk/issues/45908 Change-Id: I1665420ddcc71df7b47a87ee9e16d7ebbe9e13f5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/208080 Commit-Queue: Daco Harkes <dacoharkes@google.com> Reviewed-by: Erik Ernst <eernst@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
30 lines
943 B
Dart
30 lines
943 B
Dart
// Copyright (c) 2021, 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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// Tests lookup of null in const maps.
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import 'package:expect/expect.dart';
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main() {
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final set1 = const {null, 1, 'asdf'};
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Expect.isTrue(set1.contains(getValueNonOptimized(null)));
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Expect.equals(null, set1.lookup(null));
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final set2 = const {42, 1, 'asdf'};
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Expect.isFalse(set2.contains(getValueNonOptimized(null)));
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Expect.equals(null, set2.lookup(null));
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}
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/// Returns its argument.
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///
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/// Prevents static optimizations and inlining.
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@pragma('vm:never-inline')
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@pragma('dart2js:noInline')
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dynamic getValueNonOptimized(dynamic x) {
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// DateTime.now() cannot be predicted statically, never equal to 42.
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if (DateTime.now().millisecondsSinceEpoch == 42) {
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return getValueNonOptimized(2);
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}
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return x;
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}
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