docstr: Tests predicate returning True forever and then timing out.
docstr_tok: ["Tests","predicate","returning","True","forever","and","then","timing","out","."]
code: def test_wait_for_predicate_timeout(self):
      """Tests predicate returning True forever and then timing out."""
      predicate_mock = mock.MagicMock(side_effect=[True, True, True])
      with self.assertRaises(TimeoutError):
          train_utils.wait_for_predicate(predicate_mock, num_retries=3)
  
file_path: agents/tf_agents/train/utils/train_utils_test.py
imports: from absl.testing import parameterized
  from absl.testing.absltest import mock
  import numpy
  import reverb
  import tensorflow
  from tf_agents.system import system_multiprocessing
  from tf_agents.train.utils import test_utils
  from tf_agents.train.utils import train_utils
  from tf_agents.utils import test_utils
label_desc: Use image node_id 6 for calling the TrainUtilsTest obj's underlying member method code with example usage: obj.test_wait_for_predicate_timeout() without return types