Warn about overriding operator== but not hashCode.

dart/tests/compiler/dart2js/analyze_helper.dart

 // Copyright (c) 2013, 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 analyze_helper;
 
 import "package:expect/expect.dart";
 import 'dart:io';
 import '../../../sdk/lib/_internal/compiler/compiler.dart' as api;
 import '../../../sdk/lib/_internal/compiler/implementation/apiimpl.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart'
     hide Compiler;
 import '../../../sdk/lib/_internal/compiler/implementation/filenames.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/source_file_provider.dart';
 
 /**
  * Map of white-listed warnings and errors.
  *
  * Only add a white-listing together with a bug report to dartbug.com and add
  * the bug issue number as a comment on the white-listing.
  *
  * Use an identifiable suffix of the file uri as key. Use a fixed substring of
  * the error/warning message in the list of white-listings for each file.
  */
 // TODO(johnniwinther): Support canonical URIs as keys and message kinds as
 // values.
 
 class CollectingDiagnosticHandler extends FormattingDiagnosticHandler {
   bool hasWarnings = false;
+  bool hasLint = false;
   bool hasErrors = false;
 
   Map<String, Map<String, int>> whiteListMap
       = new Map<String, Map<String, int>>();
 
   CollectingDiagnosticHandler(Map<String, List<String>> whiteList,
                               SourceFileProvider provider)
       : super(provider) {
     whiteList.forEach((String file, List<String> messageParts) {
       var useMap = new Map<String,int>();
       for (String messagePart in messageParts) {
         useMap[messagePart] = 0;
       }
       whiteListMap[file] = useMap;
     });
   }
 
   void checkResults() {
     Expect.isFalse(hasWarnings);
+    Expect.isFalse(hasLint);
     Expect.isFalse(hasErrors);
     Expect.isTrue(checkWhiteListUse());
     reportWhiteListUse();
   }
 
   bool checkWhiteListUse() {
     bool allUsed = true;
     for (String file in whiteListMap.keys) {
       for (String messagePart in whiteListMap[file].keys) {
         if (whiteListMap[file][messagePart] == 0) {
@@ skipping 36 matching lines @@
 
   void diagnosticHandler(Uri uri, int begin, int end, String message,
                          api.Diagnostic kind) {
     if (kind == api.Diagnostic.WARNING) {
       if (checkWhiteList(uri, message)) {
         // Suppress white listed warnings.
         return;
       }
       hasWarnings = true;
     }
+    if (kind == api.Diagnostic.LINT) {
+      if (checkWhiteList(uri, message)) {
+        // Suppress white listed warnings.
+        return;
+      }
+      hasLint = true;
+    }
     if (kind == api.Diagnostic.ERROR) {
       if (checkWhiteList(uri, message)) {
         // Suppress white listed warnings.
         return;
       }
       hasErrors = true;
     }
     super.diagnosticHandler(uri, begin, end, message, kind);
   }
 }
 
 void analyze(List<Uri> uriList, Map<String, List<String>> whiteList) {
   var libraryRoot = currentDirectory.resolve('sdk/');
   var provider = new SourceFileProvider();
   var handler = new CollectingDiagnosticHandler(whiteList, provider);
   var compiler = new Compiler(
       provider.readStringFromUri,
       null,
       handler.diagnosticHandler,
       libraryRoot, libraryRoot,
       <String>['--analyze-only', '--analyze-all',
                '--categories=Client,Server']);
   compiler.librariesToAnalyzeWhenRun = uriList;
   compiler.run(null);
   handler.checkResults();
 }