Support top-level field declaration and assignment in analyzer2dart.

pkg/analyzer2dart/test/end2end_data.dart

 // Copyright (c) 2014, 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.
 
 /// Test data for the end2end test.
 library test.end2end.data;
 
-import 'test_helper.dart' show Group;
-import 'test_helper.dart' as base show TestSpec;
+import 'test_helper.dart';
 
-class TestSpec extends base.TestSpec {
+class TestSpec extends TestSpecBase {
+  final String output;
+
   const TestSpec(String input, [String output])
-      : super(input, output != null ? output : input);
+      : this.output = output != null ? output : input,
+        super(input);
 }
 
 const List<Group> TEST_DATA = const <Group>[
   const Group('Empty main', const <TestSpec>[
     const TestSpec('''
 main() {}
 '''),
 
     const TestSpec('''
 main() {}
@@ skipping 130 matching lines @@
 bar(b) {}
 foo(a) {
   bar(a);
 }
 main() {
   foo(null);
 }
 '''),
   ]),
 
-  const Group('Top level field access', const <TestSpec>[
+  const Group('Top level field', const <TestSpec>[
     const TestSpec('''
 main(args) {
   return deprecated;
 }
 '''),
+
+    const TestSpec('''
+var field;
+main(args) {
+  return field;
+}
+'''),
+
+    // TODO(johnniwinther): Eliminate unneeded `null` initializers.
+    const TestSpec('''
+var field = null;
+main(args) {
+  return field;
+}
+'''),
+
+    const TestSpec('''
+var field = 0;
+main(args) {
+  return field;
+}
+'''),
+
+    const TestSpec('''
+var field;
+main(args) {
+  field = args.length;
+  return field;
+}
+'''),
   ]),
 
   const Group('Local variables', const <TestSpec>[
     const TestSpec('''
 main() {
   var a;
   return a;
 }
 ''','''
 main() {}
@@ skipping 586 matching lines @@
   return () {}();
 }
 ''', '''
 main(a) {
   return (() {})();
 }
 '''),
 
   const TestSpec('''
 main(a) {
-  var c = a ? () { return 0; } : () { return 1; }
+  var c = a ? () { return 0; } : () { return 1; };
   return c();
 }
 ''', '''
 main(a) {
   return (a ? () {
     return 0;
   } : () {
     return 1;
   })();
 }
 '''),
   ]),
 ];