Another round of JUnit tests to finish off ResovlerErrorCodes I could reproduce

compiler/java/com/google/dart/compiler/resolver/Resolver.java

 // Copyright (c) 2012, 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.
 
 package com.google.dart.compiler.resolver;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 import com.google.dart.compiler.DartCompilationPhase;
@@ skipping 1643 matching lines @@
               name);
           break;
 
         case METHOD: {
           assert !((MethodElement) element).getModifiers().isStatic();
           onError(errorNode, ResolverErrorCode.IS_AN_INSTANCE_METHOD,
               classOrLibrary.getName(), name);
           break;
         }
 
+        case FIELD: {
+          onError(errorNode, ResolverErrorCode.IS_AN_INSTANCE_FIELD,
+              classOrLibrary.getName(), name);
+          break;
+        }
+
         default:
           throw context.internalError(errorNode, "Unexpected kind of element: %s", kind);
       }
     }
 
     private void diagnoseErrorInUnqualifiedInvocation(DartUnqualifiedInvocation node) {
       String name = node.getTarget().getName();
       Scope scope = getContext().getScope();
       Element element = scope.findElement(scope.getLibrary(), name);
       ElementKind kind = ElementKind.of(element);
@@ skipping 522 matching lines @@
           ClassElement currentClass = (ClassElement) constructor.getEnclosingElement();
           if (nextClass == currentClass) {
             return (ConstructorNodeElement) nextConstructorElement;
           }
         }
       }
     }
     return null;
   }
 }