Add --modules=node support

test/utils_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 dev_compiler.test.utils_test;
 
 import 'package:dev_compiler/src/utils.dart';
 import 'package:test/test.dart';
 
-enum Foo {
-  first, second
-}
+enum Foo { first, second }
 
 void main() {
   group('getEnumValue', () {
     test('gets simple names', () {
       expect(getEnumName(Foo.first), 'first');
     });
     test('chokes on invalid values', () {
       expect(() => getEnumName(null), throws);
       expect(() => getEnumName(''), throws);
       expect(() => getEnumName('.'), throws);
       expect(() => getEnumName('.a'), throws);
       expect(() => getEnumName('a.'), throws);
     });
   });
   group('parseEnum', () {
     Foo parseFoo(String s) => parseEnum(s, Foo.values);
     test('parses enums', () {
       expect(parseFoo('first'), Foo.first);
       expect(parseFoo('second'), Foo.second);
     });
     test('chokes on unknown enums', () {
       expect(() => parseFoo(''), throws);
       expect(() => parseFoo('what'), throws);
     });
   });
 }