Daco Harkes
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>
48 lines
1.6 KiB
Dart
48 lines
1.6 KiB
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 type literals of user-defined classes in const maps.
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import 'package:expect/expect.dart';
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class A {}
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class C<T> {}
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typedef F = T Function<T>();
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typedef Cint = C<int>;
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const aType = A;
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const fType = F;
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const cIntType = Cint;
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main() {
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final map = const {A: 42, F: 2, 'asdf': 'fdsa', Cint: 'foo'};
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Expect.equals(42, map[getValueNonOptimized(A)]);
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Expect.equals(42, map[getValueNonOptimized(aType)]);
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Expect.equals(2, map[getValueNonOptimized(F)]);
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Expect.equals(2, map[getValueNonOptimized(fType)]);
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Expect.equals('foo', map[getValueNonOptimized(Cint)]);
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Expect.equals('foo', map[getValueNonOptimized(cIntType)]);
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Expect.isTrue(map.containsKey(getValueNonOptimized(A)));
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Expect.isTrue(map.containsKey(getValueNonOptimized(aType)));
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Expect.isTrue(map.containsKey(getValueNonOptimized(F)));
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Expect.isTrue(map.containsKey(getValueNonOptimized(fType)));
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Expect.isTrue(map.containsKey(getValueNonOptimized(Cint)));
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Expect.isTrue(map.containsKey(getValueNonOptimized(cIntType)));
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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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