code: def test_set_random_test_dir_repeatable(self):
      tpu_test_wrapper.maybe_define_flags()
      tpu_test_wrapper.set_random_test_dir()
      first = flags.FLAGS.model_dir
      tpu_test_wrapper.set_random_test_dir()
      second = flags.FLAGS.model_dir
  
      self.assertNotEqual(first, second)
  
imports: import importlib.util
  import os
  from absl.testing import flagsaver
  from tensorflow.python.platform import flags
  from tensorflow.python.platform import test
  from tensorflow.python.tpu import tpu_test_wrapper
label_desc: Use image node_id 9 for calling the TPUTestWrapperTest obj's underlying member method code with example usage: obj.test_set_random_test_dir_repeatable() without return types