Fix active pokemon issue when not all mons are selected in team-preview

src/poke_env/environment/abstract_battle.py

@@ -656,6 +656,8 @@ def _parse_message(self, split_message: List[str]) -> None:
             self.get_pokemon(pokemon)._used_z_move()
         elif split_message[1] == "clearpoke":
             self._in_team_preview = True
+            for mon in self.team.values():
+                mon._clear_active()
         elif split_message[1] == "gen":
             self._format = split_message[2]
         elif split_message[1] == "inactive":

src/poke_env/environment/pokemon.py

@@ -154,6 +154,9 @@ def _cant_move(self):
         if self._status == Status.SLP:
             self._status_counter += 1
 
+    def _clear_active(self):
+        self._active = False
+
     def _clear_boosts(self):
         for stat in self._boosts:
             self._boosts[stat] = 0

unit_tests/test_data.py

@@ -1,4 +1,3 @@
-
 import pytest
 from poke_env.data import GenData
 from poke_env.environment import PokemonType