Leaf Petersen
041261f92f
Change-Id: I31d9f245f6dc1f34e13d026c95189f10f4dae75f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/163663 Reviewed-by: Paul Berry <paulberry@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
62 lines
1.5 KiB
Dart
62 lines
1.5 KiB
Dart
// Copyright (c) 2020, 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 variables which are initialized to Null are inferred at type
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/// `dynamic`.
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var global0 = null;
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var global1 = null as Null;
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class Test {
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static var static0 = null;
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static var static1 = null as Null;
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var instance0 = null;
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var instance1 = null as Null;
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}
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/// For each category of variable and each style of initialization, we test that
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/// the variable verify that the type is not `Never` by verifying that a value
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/// of type `Object` may be assigned to it, and then check that the type is
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/// `dynamic` (or `Never` which has been eliminated) by verifying that an
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/// arbitrary method may be called on it.
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void test() {
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final Object three = 3;
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{
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global0 = three;
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Expect.isFalse(global0.isEven);
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global1 = three;
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Expect.isFalse(global1.isEven);
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}
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{
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Test.static0 = three;
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Expect.isFalse(Test.static0.isEven);
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Test.static1 = three;
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Expect.isFalse(Test.static1.isEven);
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}
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{
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var o = new Test();
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o.instance0 = three;
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Expect.isFalse(o.instance0.isEven);
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o.instance1 = three;
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Expect.isFalse(o.instance1.isEven);
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}
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{
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var local0 = null;
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var local1 = null as Null;
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local0 = three;
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Expect.isFalse(local0.isEven);
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local1 = three;
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Expect.isFalse(local1.isEven);
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}
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}
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void main() {
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test();
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}
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