Bob Nystrom
14011f47e3
They're back from the grave, and ready to party! Change-Id: I088134a9be7ecabf1fbf751c015a656a15cabff9 Reviewed-on: https://dart-review.googlesource.com/12821 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: William Hesse <whesse@google.com>
45 lines
1.5 KiB
Dart
45 lines
1.5 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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// Test various conditions around instantiating an abstract class.
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// From The Dart Programming Language Specification, 11.11.1 "New":
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// If q is a constructor of an abstract class then an
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// AbstractClassInstantiation- Error is thrown.
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abstract class Interface {
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void foo(); //# 03: static type warning
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}
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abstract class AbstractClass {
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toString() => 'AbstractClass';
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}
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class ConcreteSubclass extends AbstractClass {
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toString() => 'ConcreteSubclass';
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}
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class NonAbstractClass implements Interface {
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toString() => 'NonAbstractClass';
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}
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Interface interface() => new Interface(); //# 01: static type warning
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AbstractClass abstractClass() => new AbstractClass(); //# 02: static type warning
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bool isAbstractClassInstantiationError(e) {
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return e is AbstractClassInstantiationError;
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}
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void main() {
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Expect.throws(interface, isAbstractClassInstantiationError, // //# 01: continued
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"expected AbstractClassInstantiationError"); // //# 01: continued
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Expect.throws(abstractClass, isAbstractClassInstantiationError, // //# 02: continued
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"expected AbstractClassInstantiationError"); // //# 02: continued
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Expect.stringEquals('ConcreteSubclass', '${new ConcreteSubclass()}');
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Expect.stringEquals('NonAbstractClass', '${new NonAbstractClass()}');
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}
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