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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>
19 lines
827 B
Dart
19 lines
827 B
Dart
// Copyright (c) 2017, 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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import 'package:expect/expect.dart';
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/// Dart2js only supports the const constructor for `?.fromEnvironment`. The
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/// current behavior is to throw at runtime if they call this constructor with
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/// `new` instead of `const`.
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main() {
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Expect.isFalse(const bool.fromEnvironment('X'));
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Expect.equals('', const String.fromEnvironment('X', defaultValue: ''));
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Expect.equals(const int.fromEnvironment('X', defaultValue: 0), 0);
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Expect.throws(() => new bool.fromEnvironment('X'));
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Expect.throws(() => new String.fromEnvironment('X'));
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Expect.throws(() => new int.fromEnvironment('X', defaultValue: 0));
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}
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