Sort top-level constants before other top-level variables.

pkg/analysis_server/test/services/correction/sort_members_test.dart

Index: pkg/analysis_server/test/services/correction/sort_members_test.dart
diff --git a/pkg/analysis_server/test/services/correction/sort_members_test.dart b/pkg/analysis_server/test/services/correction/sort_members_test.dart
index 48ecbffcd11fb63399d022eb4a659aeed60b27a4..f0accb645c8fb8af7e8f7d282bfedd72c9fb55e0 100644
--- a/pkg/analysis_server/test/services/correction/sort_members_test.dart
+++ b/pkg/analysis_server/test/services/correction/sort_members_test.dart
@@ -675,6 +675,24 @@ int c;
 ''');
   }
 
+  void test_unitMembers_topLevelVariable_withConst() {
+    _parseTestUnit(r'''
+int c;
+int a;
+const B = 2;
+int b;
+const A = 1;
+''');
+    // validate change
+    _assertSort(r'''
+const A = 1;
+const B = 2;
+int a;
+int b;
+int c;
+''');
+  }
+
   void _assertSort(String expectedCode) {
     MemberSorter sorter = new MemberSorter(testCode, testUnit);
     List<SourceEdit> edits = sorter.sort();