Properly handle exceptions that arise when reflectively invoking a constructor/factory.

tests/lib/mirrors/invoke_throws_test.dart

+// Copyright (c) 2013, 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.
+
+library test.invoke_throws_test;
+
+import 'dart:mirrors';
+
+import 'package:expect/expect.dart';
+
+class MyException {
+}
+
+class Class {
+  Class.noException();
+  Class.generative() { throw new MyException(); }
+  Class.redirecting() : this.generative();
+  factory Class.faktory() { throw new MyException(); }
+  factory Class.redirectingFactory() = Class.faktory;
+
+  get getter { throw new MyException(); }
+  set setter(v) { throw new MyException(); }
+  method() { throw new MyException(); }
+  
+  noSuchMethod(invocation) { throw new MyException(); }
+
+  static get staticGetter { throw new MyException(); }
+  static set staticSetter(v) { throw new MyException(); }
+  static staticFunction() { throw new MyException(); }
+}
+
+get libraryGetter { throw new MyException(); }
+set librarySetter(v) { throw new MyException(); }
+libraryFunction() { throw new MyException(); }
+
+main() {
+  InstanceMirror im = reflect(new Class.noException());
+  Expect.throws(() => im.getField(const Symbol('getter')),
+                (e) => e is MyException);
+  Expect.throws(() => im.setField(const Symbol('setter'), ['arg']),
+                (e) => e is MyException);
+  Expect.throws(() => im.invoke(const Symbol('method'), []),
+                (e) => e is MyException);
+  Expect.throws(() => im.invoke(const Symbol('triggerNoSuchMethod'), []),
+                (e) => e is MyException);
+
+  ClassMirror cm = reflectClass(Class);
+  Expect.throws(() => cm.getField(const Symbol('staticGetter')),
+                (e) => e is MyException);
+  Expect.throws(() => cm.setField(const Symbol('staticSetter'), ['arg']),
+                (e) => e is MyException);
+  Expect.throws(() => cm.invoke(const Symbol('staticFunction'), []),
+                (e) => e is MyException);
+  Expect.throws(() => cm.newInstance(const Symbol('generative'), []),
+                (e) => e is MyException);
+  Expect.throws(() => cm.newInstance(const Symbol('redirecting'), []),
+                (e) => e is MyException);
+  Expect.throws(() => cm.newInstance(const Symbol('faktory'), []),
+                (e) => e is MyException);
+  Expect.throws(() => cm.newInstance(const Symbol('redirectingFactory'), []),
+                (e) => e is MyException);
+
+  LibraryMirror lm = reflectClass(Class).owner;
+  Expect.throws(() => lm.getField(const Symbol('libraryGetter')),
+                (e) => e is MyException);
+  Expect.throws(() => lm.setField(const Symbol('librarySetter'), ['arg']),
+                (e) => e is MyException);
+  Expect.throws(() => lm.invoke(const Symbol('libraryFunction'), []),
+                (e) => e is MyException);
+}