anchor.diff:      });
     }
   
  -  Future<void> test_dartSdkSummaryPath_strong() async {
  -    await withTempDirAsync((tempDir) async {
  -      var sdkPath = _findSdkDirForSummaries();
  -      var strongSummaryPath =
  -          path.join(sdkPath, 'lib', '_internal', 'strong.sum');
  -
  -      var testDart = path.join(tempDir, 'test.dart');
  -      var testSum = path.join(tempDir, 'test.sum');
  -      File(testDart).writeAsStringSync('var v = 42;');
  -
  -      await _doDrive(testDart,
  -          additionalArgs: [
  -            '--build-summary-only',
  -            '--build-summary-output=$testSum'
  -          ],
  -          dartSdkSummaryPath: strongSummaryPath);
  -      var output = File(testSum);
  -      expect(output.existsSync(), isTrue);
  -      expect(exitCode, 0);
  -    });
  -  }
  -
     Future<void> test_error_notUriPipePath() async {
       await withTempDirAsync((tempDir) async {
         var testDart = path.join(tempDir, 'test.dart');
  
positive.code: 
        // Analyze package:bbb/b.dart and compute summary.
        {
          await _doDrive(bDart, uri: bUri, additionalArgs: [
            '--build-summary-input=$aSum',
            '--build-summary-output=$bSum'
          ]);
  
negative.code: 
        // Analyze b.dart (part) and then a.dart (its library).
        // No errors should be reported - the part should know its library.
        await _doDrive(bDart, fileUri: bUri, additionalArgs: ['$aUri|$aDart']);
        expect(errorSink, isEmpty);
      });
    }
  