Verify correctness of classes derived from Enum.

pkg/analyzer/test/test_all.dart

Index: pkg/analyzer/test/test_all.dart
diff --git a/pkg/analyzer/test/test_all.dart b/pkg/analyzer/test/test_all.dart
index 448b519c909581f3a903159be8091fc6bdba4675..b1fceafe7258f1e7da7244da9114648ec013884a 100644
--- a/pkg/analyzer/test/test_all.dart
+++ b/pkg/analyzer/test/test_all.dart
@@ -6,6 +6,7 @@ library test.engine;
 
 import 'package:unittest/unittest.dart';
 
+import 'enum_test.dart' as enum_test;
 import 'error_test.dart' as error;
 import 'file_system/test_all.dart' as file_system;
 import 'generated/test_all.dart' as generated;
@@ -18,6 +19,7 @@ import 'source/test_all.dart' as source;
 main() {
   groupSep = ' | ';
   group('analysis engine', () {
+    enum_test.main();
     error.main();
     file_system.main();
     generated.main();