mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 16:41:07 +00:00
912005267d
Change-Id: I46be49b2effec3e38a3dc44cd45cfe736f77fa78 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182680 Commit-Queue: Sigmund Cherem <sigmund@google.com> Reviewed-by: Joshua Litt <joshualitt@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com> Reviewed-by: Stephen Adams <sra@google.com>
61 lines
1.8 KiB
Dart
61 lines
1.8 KiB
Dart
// Copyright (c) 2015, 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";
|
|
|
|
// Test that dart2js does not rewrite conditional into logical operators
|
|
// in cases where it changes which falsy value is returned.
|
|
|
|
posFalse(x, y) => x != null ? y : false;
|
|
negFalse(x, y) => x != null ? !y : false;
|
|
posNull(x, y) => x != null ? y : null;
|
|
negNull(x, y) => x != null ? !y : null;
|
|
|
|
main() {
|
|
Expect.equals(false, posFalse(null, false));
|
|
Expect.equals(false, negFalse(null, false));
|
|
Expect.equals(null, posNull(null, false));
|
|
Expect.equals(null, negNull(null, false));
|
|
|
|
Expect.equals(false, posFalse(null, true));
|
|
Expect.equals(false, negFalse(null, true));
|
|
Expect.equals(null, posNull(null, true));
|
|
Expect.equals(null, negNull(null, true));
|
|
|
|
Expect.equals(false, posFalse([], false));
|
|
Expect.equals(true, negFalse([], false));
|
|
Expect.equals(false, posNull([], false));
|
|
Expect.equals(true, negNull([], false));
|
|
|
|
Expect.equals(true, posFalse([], true));
|
|
Expect.equals(false, negFalse([], true));
|
|
Expect.equals(true, posNull([], true));
|
|
Expect.equals(false, negNull([], true));
|
|
|
|
if (isConditionCheckDisabled) {
|
|
Expect.equals(null, posFalse([], null));
|
|
Expect.equals(true, negFalse([], null));
|
|
Expect.equals(null, posNull([], null));
|
|
Expect.equals(true, negNull([], null));
|
|
|
|
var y = {};
|
|
Expect.identical(y, posFalse([], y));
|
|
Expect.equals(true, negFalse([], y));
|
|
Expect.identical(y, posNull([], y));
|
|
Expect.equals(true, negNull([], y));
|
|
}
|
|
}
|
|
|
|
bool get isConditionCheckDisabled {
|
|
bool? b = null;
|
|
for (int i = 0; i < 3; i++) {
|
|
try {
|
|
b = !(b as dynamic);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|