🐛 fix union validation error (#1001)

tests/plugins/param/param_bot.py

@@ -1,3 +1,5 @@
+from typing import Union
+
 from nonebot.adapters import Bot
 
 
@@ -5,9 +7,29 @@ async def get_bot(b: Bot) -> Bot:
     return b
 
 
-class SubBot(Bot):
+async def legacy_bot(bot):
+    return bot
+
+
+async def not_legacy_bot(bot: int):
     ...
 
 
-async def sub_bot(b: SubBot) -> SubBot:
+class FooBot(Bot):
+    ...
+
+
+async def sub_bot(b: FooBot) -> FooBot:
     return b
+
+
+class BarBot(Bot):
+    ...
+
+
+async def union_bot(b: Union[FooBot, BarBot]) -> Union[FooBot, BarBot]:
+    return b
+
+
+async def not_bot(b: Union[int, Bot]):
+    ...

tests/plugins/param/param_event.py

@@ -1,3 +1,5 @@
+from typing import Union
+
 from nonebot.adapters import Event, Message
 from nonebot.params import EventToMe, EventType, EventMessage, EventPlainText
 
@@ -6,14 +8,34 @@ async def event(e: Event) -> Event:
     return e
 
 
-class SubEvent(Event):
+async def legacy_event(event):
+    return event
+
+
+async def not_legacy_event(event: int):
     ...
 
 
-async def sub_event(e: SubEvent) -> SubEvent:
+class FooEvent(Event):
+    ...
+
+
+async def sub_event(e: FooEvent) -> FooEvent:
     return e
 
 
+class BarEvent(Event):
+    ...
+
+
+async def union_event(e: Union[FooEvent, BarEvent]) -> Union[FooEvent, BarEvent]:
+    return e
+
+
+async def not_event(e: Union[int, Event]):
+    ...
+
+
 async def event_type(t: str = EventType()) -> str:
     return t
 

tests/plugins/param/param_state.py

@@ -19,6 +19,14 @@ async def state(x: T_State) -> T_State:
     return x
 
 
+async def legacy_state(state):
+    return state
+
+
+async def not_legacy_state(state: int):
+    ...
+
+
 async def command(cmd: Tuple[str, ...] = Command()) -> Tuple[str, ...]:
     return cmd