anchor.diff:          });
     });
   
  -  group('ShardPartBilder', () {
  +  group('SharedPartBuilder', () {
       test('outputs <partId>.g.part files', () async {
         await testBuilder(
             new SharedPartBuilder(
  
positive.code:   });
  
    group('CombiningBuilder', () {
      test('outputs `.g.dart` files', () async {
        await testBuilder(
            new CombiningBuilder(),
  
negative.code:                 decodedMatches(isNot(contains('part of'))),
            });
      });
  
      group('constructor', () {
        for (var entry in {
          'starts with `.`': '.foo',
  