[Test] More comprehensive tests for auto_spec

ghstack-source-id: 7535249
Pull Request resolved: #2640

Author: Vincent Moens

test/mocking_classes.py

@@ -1931,14 +1931,18 @@ def __init__(self):
             tensor=Unbounded(3),
             non_tensor=NonTensor(shape=()),
         )
+        self._saved_obs_spec = self.observation_spec.clone()
         self.state_spec = Composite(
             non_tensor=NonTensor(shape=()),
         )
+        self._saved_state_spec = self.state_spec.clone()
         self.reward_spec = Unbounded(1)
+        self._saved_full_reward_spec = self.full_reward_spec.clone()
         self.action_spec = Unbounded(1)
+        self._saved_full_action_spec = self.full_action_spec.clone()
 
     def _reset(self, tensordict):
-        data = self.observation_spec.zero()
+        data = self._saved_obs_spec.zero()
         data.set_non_tensor("non_tensor", 0)
         data.update(self.full_done_spec.zero())
         return data
@@ -1947,10 +1951,10 @@ def _step(
         self,
         tensordict: TensorDictBase,
     ) -> TensorDictBase:
-        data = self.observation_spec.zero()
+        data = self._saved_obs_spec.zero()
         data.set_non_tensor("non_tensor", tensordict["non_tensor"] + 1)
         data.update(self.full_done_spec.zero())
-        data.update(self.full_reward_spec.zero())
+        data.update(self._saved_full_reward_spec.zero())
         return data
 
     def _set_seed(self, seed: Optional[int]):

test/test_env.py

@@ -3553,8 +3553,13 @@ def test_single_env_spec():
     assert env.input_spec.is_in(env.input_spec_unbatched.zeros(env.shape))
 
 
-def test_auto_spec():
-    env = CountingEnv()
+@pytest.mark.parametrize("env_type", [CountingEnv, EnvWithMetadata])
+def test_auto_spec(env_type):
+    if env_type is EnvWithMetadata:
+        obs_vals = ["tensor", "non_tensor"]
+    else:
+        obs_vals = "observation"
+    env = env_type()
     td = env.reset()
 
     policy = lambda td, action_spec=env.full_action_spec.clone(): td.update(
@@ -3577,7 +3582,7 @@ def test_auto_spec():
         shape=env.full_state_spec.shape, device=env.full_state_spec.device
     )
     env._action_keys = ["action"]
-    env.auto_specs_(policy, tensordict=td.copy())
+    env.auto_specs_(policy, tensordict=td.copy(), observation_key=obs_vals)
     env.check_env_specs(tensordict=td.copy())