anchor.diff:  import 'package:analysis_server/src/constants.dart';
   import 'package:analysis_server/src/domain_analysis.dart';
   import 'package:analyzer/src/generated/engine.dart';
  +import 'package:analyzer/src/services/lint.dart';
   import 'package:test_reflective_loader/test_reflective_loader.dart';
   import 'package:unittest/unittest.dart';
   
  
positive.code:     super.tearDown();
    }
  
    test_options_file_added() async {
      addTestFile(testSource);
      setAnalysisRoot();
  
negative.code:     await waitForTasksFinished();
  
      verifyStrongMode(enabled: false);
    }
  
    void verifyLintsEnabled(List<String> lints) {
      expect(testContext.analysisOptions.lint, true);
      var rules = getLints(testContext).map((rule) => rule.name);
      expect(rules, unorderedEquals(lints));
    }
  
    verifyStrongMode({bool enabled}) {
  