Code completion improvement in the DAS- only suggest completions on the RHS of an as-expression tha…

pkg/analysis_server/test/completion_test.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.
 
 library test.completion.support;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:unittest/unittest.dart';
@@ skipping 2888 matching lines @@
   A(this.ay, this.az) {
     ay.!1y;
     az.!2x;
   }
 }''',
         <String>["1+y", "1-x", "2+x", "2-y"],
         failingTests: '2');
 
     // test analysis of untyped fields and top-level vars
     buildTests('test039', '''class X{}var x = null as !1X;''',
-        <String>["1+X", "1-void"]);
+        <String>["1-void"]);
 
     // test arg lists with named params
     buildTests('test040', '''m(){f(a, b, {x1, x2, y}) {};f(1, 2, !1)!2;}''',
         <String>["1+x1", "2-x2"],
         failingTests: '1');
 
     // test arg lists with named params
     buildTests('test041', '''m(){f(a, b, {x1, x2, y}) {};f(1, 2, !1''',
         <String>["1+x1", "1+x2", "1+y"],
         failingTests: '1');
@@ skipping 71 matching lines @@
       } else {
         ++expectedPassCount;
         tester(testName, () {
           CompletionTestCase test = new CompletionTestCase();
           return test.runTest(spec, extraFiles);
         });
       }
     }
   }
 }