Add ClassMirror.isEnum.

tests/lib/mirrors/enum_test.dart

+// Copyright (c) 2015, 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.enums;
+
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+import 'stringify.dart';
+
+class C {}
+enum Suite { CLUBS, DIAMONDS, SPADES, HEARTS }
+
+main() {
+  Expect.isFalse(reflectClass(C).isEnum);
+
+  Expect.isTrue(reflectClass(Suite).isEnum);
+  Expect.isFalse(reflectClass(Suite).isAbstract);
+  Expect.equals(0, reflectClass(Suite).declarations.values.where(
+                       (d) => d is MethodMirror && d.isConstructor).length);
+
+  Expect.equals(reflectClass(Suite),
+                (reflectClass(C).owner as LibraryMirror).declarations[#Suite],
+                "found in library");
+
+  Expect.equals(reflectClass(Suite), reflect(Suite.CLUBS).type);
+
+  Expect.equals(0, reflect(Suite.CLUBS).getField(#index).reflectee);
+  Expect.equals(1, reflect(Suite.DIAMONDS).getField(#index).reflectee);
+  Expect.equals(2, reflect(Suite.SPADES).getField(#index).reflectee);
+  Expect.equals(3, reflect(Suite.HEARTS).getField(#index).reflectee);
+
+  Expect.equals("Suite.CLUBS",
+                reflect(Suite.CLUBS).invoke(#toString, []).reflectee);
+  Expect.equals("Suite.DIAMONDS",
+                 reflect(Suite.DIAMONDS).invoke(#toString, []).reflectee);
+  Expect.equals("Suite.SPADES",
+                reflect(Suite.SPADES).invoke(#toString, []).reflectee);
+  Expect.equals("Suite.HEARTS",
+                reflect(Suite.HEARTS).invoke(#toString, []).reflectee);
+
+ Expect.setEquals(
+   ['Variable(s(index) in s(Suite), final)',
+    'Variable(s(CLUBS) in s(Suite), static, final)',
+    'Variable(s(DIAMONDS) in s(Suite), static, final)',
+    'Variable(s(SPADES) in s(Suite), static, final)',
+    'Variable(s(HEARTS) in s(Suite), static, final)',
+    'Variable(s(values) in s(Suite), static, final)',
+    'Method(s(toString) in s(Suite))'],
+   reflectClass(Suite).declarations.values
+       .where((d) => !d.isPrivate).map(stringify));
+}