code: def test_check_states(self):
      self.assertEqual(
          (False, 0.0),
          self.env._check_states(
              np.array([[0, 0, 0], [0, 0, 0], [0, 0, 1]])
          ),
      )
      self.assertEqual(
          (True, -1.0),
          self.env._check_states(
              np.array([[2, 2, 2], [0, 1, 1], [0, 0, 0]])
          ),
      )
      self.assertEqual(
          (True, 1.0),
          self.env._check_states(
              np.array([[2, 2, 0], [1, 1, 1], [0, 0, 0]])
          ),
      )
      self.assertEqual(
          (False, 0.0),
          self.env._check_states(
              np.array([[2, 2, 1], [1, 2, 1], [1, 0, 0]])
          ),
      )
      self.assertEqual(
          (True, 0.0),
          self.env._check_states(
              np.array([[2, 1, 2], [1, 2, 1], [1, 2, 1]])
          ),
      )
  
file_path: agents/tf_agents/environments/examples/tic_tac_toe_environment_test.py
imports: import numpy
  from tf_agents.environments import utils
  from tf_agents.environments.examples.tic_tac_toe_environment import TicTacToeEnvironment
  from tf_agents.trajectories.time_step import StepType
  from tf_agents.trajectories.time_step import TimeStep
  from tf_agents.utils import test_utils
label_desc: Use image node_id 3 for calling the TicTacToeEnvironmentTest obj's underlying member method code with example usage: obj.test_check_states() without return types