OptionsValidator plugin extension and linter service.

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 test.src.task.options_test;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 137 matching lines @@
   test_linter_supported_rules() {
     validate(
         '''
 linter:
   rules:
     - camel_case_types
     ''',
         []);
   }
 
-  test_linter_unssupported_option() {
+  test_linter_unsupported_option() {
     validate(
         '''
 linter:
   unsupported: true
     ''',
         [AnalysisOptionsWarningCode.UNSUPPORTED_OPTION]);
   }
 
   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));
   }
 }