Implement JsClassMirror.constructors.

dart/tests/lib/mirrors/reflect_model_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.reflect_model_test;
 
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
 
@@ skipping 37 matching lines @@
   if (variable.isFinal) buffer.write(', final');
   return (buffer..write(')')).toString();
 }
 
 stringifyMethod(MethodMirror method) {
   var buffer = new StringBuffer('Method(');
   writeDeclarationOn(method, buffer);
   if (method.isStatic) buffer.write(', static');
   if (method.isGetter) buffer.write(', getter');
   if (method.isSetter) buffer.write(', setter');
+  if (method.isConstructor) buffer.write(', constructor');
   return (buffer..write(')')).toString();
 }
 
 stringify(value) {
   if (value is Map) return stringifyMap(value);
   if (value is VariableMirror) return stringifyVariable(value);
   if (value is MethodMirror) return stringifyMethod(value);
   if (value is Symbol) return stringifySymbol(value);
   if (value == null) return '<null>';
   throw 'Unexpected value: $value';
@@ skipping 92 matching lines @@
   Expect.equals('aMethod', c.invoke(aMethod, []).reflectee);
 
   Expect.throws(() { a.invoke(bMethod, []); }, isNoSuchMethodError);
   Expect.equals('bMethod', b.invoke(bMethod, []).reflectee);
   Expect.equals('bMethod', c.invoke(bMethod, []).reflectee);
 
   Expect.throws(() { a.invoke(cMethod, []); }, isNoSuchMethodError);
   Expect.throws(() { b.invoke(cMethod, []); }, isNoSuchMethodError);
   Expect.equals('cMethod', c.invoke(cMethod, []).reflectee);
 }