code: def testNumSteps(self):
      self._decorator.reset()
      self.assertEqual(self._decorator.num_steps(), 0)
      self._decorator.step(None, None)
      self.assertEqual(self._decorator.num_steps(), 1)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import tempfile
  from absl.testing import absltest
  import numpy
  import six
  from PIL import Image
  from python.tests.utils import test_environment_decorator
label_desc: Use image node_id 11 for calling the TestEnvironmentDecoratorTest obj's underlying member method code with example usage: obj.testNumSteps() without return types