fix suggestions in class body and more common tests

pkg/analysis_server/lib/src/services/completion/imported_computer.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 services.completion.computer.dart.toplevel;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol_server.dart' hide Element,
     ElementKind;
@@ skipping 46 matching lines @@
     // Make suggestions for the target, but not for the selector
     // InvocationComputer makes selector suggestions
     Expression target = node.target;
     if (target != null && request.offset <= target.end) {
       return _addImportedElementSuggestions();
     }
     return new Future.value(false);
   }
 
   @override
+  Future<bool> visitClassDeclaration(ClassDeclaration node) {
+    // Make suggestions in the body of the class declaration
+    Token leftBracket = node.leftBracket;
+    if (leftBracket != null && request.offset >= leftBracket.end) {
+      return _addImportedElementSuggestions();
+    }
+    return new Future.value(false);
+  }
+
+  @override
   Future<bool> visitCombinator(Combinator node) {
     return _addCombinatorSuggestions(node);
   }
 
   @override
   Future<bool> visitExpression(Expression node) {
     return _addImportedElementSuggestions();
   }
 
   @override
@@ skipping 180 matching lines @@
           importElem.isDeprecated,
           false);
       LibraryElement lib = importElem.importedLibrary;
       if (lib != null) {
         suggestion.element = newElement_fromEngine(lib);
       }
       request.suggestions.add(suggestion);
     }
   }
 }