Error code validation updates.

pkg/analyzer/test/src/task/options_test.dart

 // Copyright (c) 2015, 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 analyzer.test.src.task.options_test;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/source/error_processor.dart';
 import 'package:analyzer/src/generated/engine.dart';
@@ skipping 219 matching lines @@
   final OptionsFileValidator validator =
       new OptionsFileValidator(new TestSource());
   final AnalysisOptionsProvider optionsProvider = new AnalysisOptionsProvider();
 
   test_analyzer_error_code_supported() {
     validate(
         '''
 analyzer:
   errors:
     unused_local_variable: ignore
+    invalid_assignment: warning
+    missing_return: error
+    dead_code: info
 ''',
         []);
   }
 
   test_analyzer_error_code_supported_bad_value() {
     validate(
         '''
 analyzer:
   errors:
     unused_local_variable: ftw
@@ skipping 107 matching lines @@
         [AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUE]);
   }
 
   void validate(String source, List<AnalysisOptionsErrorCode> expected) {
     var options = optionsProvider.getOptionsFromString(source);
     var errors = validator.validate(options);
     expect(errors.map((AnalysisError e) => e.errorCode),
         unorderedEquals(expected));
   }
 }