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96cea64fa6
Change-Id: I0a63a6864c568491ad5e20b6eb490760e620a889 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/130200 Commit-Queue: Mark Zhou <markzipan@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
34 lines
907 B
Dart
34 lines
907 B
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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// Test that Null inherits properties from Object.
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main() {
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var x;
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Expect.isTrue(x is Object?);
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Expect.isTrue(x is! Object);
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Expect.isTrue(x is dynamic);
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Expect.isTrue(x is! String);
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Expect.isTrue(x is! int);
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// These shouldn't throw.
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x.runtimeType;
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x.toString();
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x.hashCode;
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// operator== is inherited from Object. It's the same as identical.
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// It's not really testable.
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Expect.isTrue(identical(x, null));
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Expect.isTrue(x == null);
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// Methods can be closurized and yields the same result.
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var ts = x.toString;
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Expect.equals(null.toString(), ts());
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// noSuchMethod is tested in null_nosuchmethod_test.dart.
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}
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