class_docstr: Unit-test mock environment.
  
  Args:
      states: States specification.
      actions: Actions specification.
      min_timesteps: Minimum number of timesteps.
code: def reset(self):
      self.timestep = 0
      self._states = self.random_states()
      return self._states
  
file_path: tensorforce/test/unittest_environment.py
imports: from collections import OrderedDict
  from random import random
  import numpy
  from tensorforce import Environment, TensorforceError, util
label_desc: Use image node_id 9 for calling the UnittestEnvironment obj's underlying member method code with example usage: obj.reset() and returns: self