Test of AbstractClassInstantiationError.

dart/tests/language/abstract_runtime_error_test.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Test various conditions around instantiating an abstract class.
+
+// From The Dart Programming Langauge Specification, 11.11.1 "New":
+//   If q is a constructor of an abstract class then an
+//   AbstractClassInstantiation- Error is thrown.
+
+
+abstract class Interface {
+  void foo();
+}
+
+abstract class AbstractClass {
+  toString() => 'AbstractClass';
+}
+
+class ConcreteSubclass extends AbstractClass {
+  toString() => 'ConcreteSubclass';
+}
+
+class NonAbstractClass implements Interface {
+  toString() => 'NonAbstractClass';
+}
+
+Interface interface() => new Interface();
+
+AbstractClass abstractClass() => new AbstractClass();
+
+bool isAbstractClassInstantiationError(e) {
+  return e is AbstractClassInstantiationError;
+}
+
+void main() {
+  Expect.throws(interface, isAbstractClassInstantiationError,
+                "expected AbstractClassInstantiationError");
+  Expect.throws(abstractClass, isAbstractClassInstantiationError,
+                "expected AbstractClassInstantiationError");
+  Expect.stringEquals('ConcreteSubclass', '${new ConcreteSubclass()}');

[bakster, 2012/10/10 13:56:17]

I prefer:
  Expect.equals(new ConcreteSubclass() is ConcreteSubclass);

+  Expect.stringEquals('NonAbstractClass', '${new NonAbstractClass()}');
+}