iter states in states group

aiogram/dispatcher/fsm/state.py

@@ -118,6 +118,9 @@ class StatesGroupMeta(type):
     def __str__(self) -> str:
         return f"<StatesGroup '{self.__full_group_name__}'>"
 
+    def __iter__(self):
+        return iter(self.__all_states__)
+
 
 class StatesGroup(metaclass=StatesGroupMeta):
     @classmethod

tests/test_dispatcher/test_fsm/test_state.py

@@ -150,3 +150,10 @@ class TestStatesGroup:
         assert 42 not in MyGroup
 
         assert MyGroup.MyNestedGroup.get_root() is MyGroup
+
+    def test_iterable(self):
+        class Group(StatesGroup):
+            x = State()
+            y = State()
+
+        assert set(Group) == {Group.x, Group.y}