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';
+}
+
+void main() {
+  try {

[kasperl, 2012/10/10 08:43:49]

Maybe use:

 Expect.throws(() => new Interface(), (e) => 
               e is AbstractClassInstantiationError);

[ahe, 2012/10/10 09:27:21]

Done.

+    new Interface();
+    throw 'AbstractClassInstantiationError expected';
+  } on AbstractClassInstantiationError {
+    // OK
+  }
+
+  try {
+    new AbstractClass();
+    throw 'AbstractClassInstantiationError expected';
+  } on AbstractClassInstantiationError {
+    // OK
+  }
+
+  Expect.stringEquals('ConcreteSubclass', '${new ConcreteSubclass()}');
+  Expect.stringEquals('NonAbstractClass', '${new NonAbstractClass()}');
+}