text: from genrl import PPO1, TD3
  from genrl.deep.common import OffPolicyTrainer, OnPolicyTrainer
  from genrl.environments import VectorEnv
  
  
  def test_on_policy_trainer():
      env = VectorEnv("CartPole-v1", 2)
      algo = PPO1("mlp", env)
      trainer = OnPolicyTrainer(algo, env, ["stdout"], epochs=1)
      assert not trainer.off_policy
      trainer.train()
  
  
  def test_off_policy_trainer():
      env = VectorEnv("Pendulum-v0", 2)
      algo = TD3("mlp", env)
      trainer = OffPolicyTrainer(algo, env, ["stdout"], epochs=1)
      assert trainer.off_policy
      trainer.train()
  