anchor.diff:    });
   
     group('Setters', () {
  -    test('happy path', () {
  -      _standardFlutterDirectoryL10nSetup(fs);
  -      expect(() {
  -        final LocalizationsGenerator generator = LocalizationsGenerator(fs);
  -        generator.initialize(
  -          l10nDirectoryPath: defaultArbPathString,
  -          templateArbFileName: defaultTemplateArbFileName,
  -          outputFileString: defaultOutputFileString,
  -          classNameString: defaultClassNameString,
  -        );
  -      }, returnsNormally);
  -    });
  -
       test('setL10nDirectory fails if the directory does not exist', () {
         final LocalizationsGenerator generator = LocalizationsGenerator(fs);
         try {
  
positive.code:     });
    });
  
    group('generateOutputFile', () {
      test('correctly generates the localizations classes', () {
        _standardFlutterDirectoryL10nSetup(fs);
        final LocalizationsGenerator generator = LocalizationsGenerator(fs);
        try {
          generator.initialize(
            l10nDirectoryPath: defaultArbPathString,
            templateArbFileName: defaultTemplateArbFileName,
            outputFileString: defaultOutputFileString,
            classNameString: defaultClassNameString,
          );
          generator.parseArbFiles();
          generator.generateClassMethods();
          generator.generateOutputFile();
        } on Exception catch (e) {
          fail('Generating output localization file should succeed: \n$e');
        }
  
        final String outputFileString = generator.outputFile.readAsStringSync();
        expect(outputFileString, contains('class AppLocalizations'));
        expect(outputFileString, contains('class _AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations>'));
      });
    });
  
    group('generateString', () {
      test('handles simple string', () {
        expect(generateString('abc'), "'abc'");
  
negative.code:   });
  
    group('generateClassMethods', () {
      group('DateTime tests', () {
        test('throws an exception when improperly formatted date is passed in', () {
          const String singleDateMessageArbFileString = '''{
    "springBegins": "Spring begins on {springStartDate}",
  