Robert Nystrom
99564b09b4
Change-Id: I9336b7fa58c144c8b946e7aac3128a9d9925d7d4 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149787 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
49 lines
1.2 KiB
Dart
49 lines
1.2 KiB
Dart
// Copyright (c) 2012, 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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main() {
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Expect.isFalse(null is Object);
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Expect.isTrue(null is Object?);
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Expect.isTrue(null is Null);
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Expect.isFalse(null is int);
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Expect.isFalse(null is bool);
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Expect.isFalse(null is num);
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Expect.isFalse(null is String);
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Expect.isFalse(null is List);
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Expect.isFalse(null is Expect);
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test(null);
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Expect.isFalse(1 is Null);
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Expect.isFalse("1" is Null);
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Expect.isFalse(true is Null);
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Expect.isFalse(false is Null);
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Expect.isFalse(new Object() is Null);
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testNegative(1);
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testNegative("1");
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testNegative(true);
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testNegative(false);
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testNegative(new Object());
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}
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test(n) {
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// Test where the argument is not a compile-time constant.
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Expect.isFalse(n is Object);
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Expect.isTrue(n is Object?);
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Expect.isTrue(n is Null);
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Expect.isFalse(n is int);
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Expect.isFalse(n is bool);
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Expect.isFalse(n is num);
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Expect.isFalse(n is String);
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Expect.isFalse(n is List);
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Expect.isFalse(n is Expect);
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}
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testNegative(n) {
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Expect.isFalse(n is Null);
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}
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