Support top-level field declaration and assignment in analyzer2dart.

pkg/analyzer2dart/test/end2end_data.dart

Index: pkg/analyzer2dart/test/end2end_data.dart
diff --git a/pkg/analyzer2dart/test/end2end_data.dart b/pkg/analyzer2dart/test/end2end_data.dart
index 0d380d12a6a7a2aa52f7235e1be6580b548baeec..9904703991a626928d4df579a8d78ee0ea782750 100644
--- a/pkg/analyzer2dart/test/end2end_data.dart
+++ b/pkg/analyzer2dart/test/end2end_data.dart
@@ -5,12 +5,14 @@
 /// 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 TestSpecBase {
+  final String output;
 
-class TestSpec extends base.TestSpec {
   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>[
@@ -161,12 +163,42 @@ main() {
 '''),
   ]),
 
-  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>[
@@ -773,7 +805,7 @@ main(a) {
 
   const TestSpec('''
 main(a) {
-  var c = a ? () { return 0; } : () { return 1; }
+  var c = a ? () { return 0; } : () { return 1; };
   return c();
 }
 ''', '''