anchor.diff:      return listenerFile.path;
     }
   
  -  String _getBundlePath(List<_Finalizer> finalizers, int ourTestCount) {
  -    if (precompiledDillPath != null) {
  -      return artifacts.getArtifactPath(Artifact.flutterPatchedSdkPath);
  -    }
  -
  -    // bundlePath needs to point to a folder with `platform.dill` file.
  -    final Directory tempBundleDirectory = fs.systemTempDirectory
  -        .createTempSync('flutter_test_bundle.');
  -    finalizers.add(() async {
  -      printTrace(
  -          'test $ourTestCount: deleting temporary bundle directory');
  -      tempBundleDirectory.deleteSync(recursive: true);
  -    });
  -
  -    // copy 'vm_platform_strong.dill' into 'platform_strong.dill'
  -    final File vmPlatformStrongDill = fs.file(
  -      artifacts.getArtifactPath(Artifact.platformKernelDill),
  -    );
  -    printTrace('Copying platform_strong.dill file from ${vmPlatformStrongDill.path}');
  -    final File platformDill = vmPlatformStrongDill.copySync(
  -      tempBundleDirectory
  -          .childFile('platform_strong.dill')
  -          .path,
  -    );
  -    if (!platformDill.existsSync()) {
  -      printError('unexpected error copying platform kernel file');
  -    }
  -
  -    return tempBundleDirectory.path;
  -  }
  -
     String _generateTestMain({
       Uri testUrl,
     }) {
  
positive.code:     String executable,
      String testPath, {
      String packages,
      String bundlePath,
      bool enableObservatory = false,
      bool startPaused = false,
      int observatoryPort,
  
negative.code:         packages: PackageMap.globalPackagesPath,
          enableObservatory: enableObservatory,
          startPaused: startPaused,
          observatoryPort: explicitObservatoryPort,
          serverPort: server.port,
        );
  