code: def testAllFilesPattern(self):
      self.assertEqual("model/*", io_utils.all_files_pattern("model"))
  
imports: import os
  from unittest import mock
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.utils import io_utils
  from tensorflow.python.lib.io import file_io
label_desc: Use image node_id 17 for calling the IoUtilsTest obj's underlying member method code with example usage: obj.testAllFilesPattern() without return types