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05ca544f15
Change-Id: Iaa0ca2b4f2d1b15f79ddca37834d3ed2497bc068 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149242 Commit-Queue: Joshua Litt <joshualitt@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
63 lines
1.8 KiB
Dart
63 lines
1.8 KiB
Dart
// Copyright (c) 2015, 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 = 2.7
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import "package:expect/expect.dart";
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// Test that dart2js does not rewrite conditional into logical operators
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// in cases where it changes which falsy value is returned.
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posFalse(x, y) => x != null ? y : false;
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negFalse(x, y) => x != null ? !y : false;
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posNull(x, y) => x != null ? y : null;
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negNull(x, y) => x != null ? !y : null;
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main() {
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Expect.equals(false, posFalse(null, false));
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Expect.equals(false, negFalse(null, false));
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Expect.equals(null, posNull(null, false));
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Expect.equals(null, negNull(null, false));
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Expect.equals(false, posFalse(null, true));
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Expect.equals(false, negFalse(null, true));
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Expect.equals(null, posNull(null, true));
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Expect.equals(null, negNull(null, true));
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Expect.equals(false, posFalse([], false));
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Expect.equals(true, negFalse([], false));
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Expect.equals(false, posNull([], false));
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Expect.equals(true, negNull([], false));
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Expect.equals(true, posFalse([], true));
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Expect.equals(false, negFalse([], true));
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Expect.equals(true, posNull([], true));
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Expect.equals(false, negNull([], true));
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if (isConditionCheckDisabled) {
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Expect.equals(null, posFalse([], null));
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Expect.equals(true, negFalse([], null));
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Expect.equals(null, posNull([], null));
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Expect.equals(true, negNull([], null));
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var y = {};
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Expect.identical(y, posFalse([], y));
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Expect.equals(true, negFalse([], y));
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Expect.identical(y, posNull([], y));
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Expect.equals(true, negNull([], y));
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}
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}
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bool get isConditionCheckDisabled {
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bool b = null;
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for (int i = 0; i < 3; i++) {
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try {
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b = !b;
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} catch (e) {
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return false;
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}
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}
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return true;
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}
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