anchor.diff:      // has to then understand that.
       await drive('data/exclude_test_project',
           options: 'data/exclude_test_project/$optionsFileName');
  -    _expectUndefinedClassErrorsWithoutExclusions(usePreviewDart2);
  +    _expectUndefinedClassErrorsWithoutExclusions();
     }
   
     test_analysisOptions_excludesRelativeToAnalysisOptions_inferred() async {
  
positive.code:         options: 'data/options_tests_project/$optionsFileName');
    }
  
    void _expectUndefinedClassErrorsWithoutExclusions(bool isStrong) {
      final String issueType = isStrong ? 'error' : 'warning';
      expect(bulletToDash(outSink),
          contains("$issueType - Undefined class 'IncludedUndefinedClass'"));
  
negative.code:     // analysis_options above lib. The exclude is relative to the project, not
      // the analyzed path, and it has to then understand that.
      await drive('data/exclude_test_project/lib', options: null);
      _expectUndefinedClassErrorsWithoutExclusions();
    }
  
    test_analyzeFilesInDifferentContexts() async {
  