Reverse future done checks so we know they are actually reachable (#708)

aioesphomeapi/connection.py

@@ -220,8 +220,7 @@ class APIConnection:
         if self._debug_enabled:
             _LOGGER.debug("Cleaning up connection to %s", self.log_name)
         for fut in self._read_exception_futures:
-            if fut.done():
-                continue
+            if not fut.done():
                 err = self._fatal_exception or APIConnectionError("Connection closed")
                 new_exc = err
                 if not isinstance(err, APIConnectionError):
@@ -676,8 +675,7 @@ class APIConnection:
 
     def _handle_timeout(self, fut: asyncio.Future[None]) -> None:
         """Handle a timeout."""
-        if fut.done():
-            return
+        if not fut.done():
             fut.set_exception(asyncio_TimeoutError)
 
     def _handle_complex_message(
@@ -689,8 +687,7 @@ class APIConnection:
         resp: message.Message,
     ) -> None:
         """Handle a message that is part of a response."""
-        if fut.done():
-            return
+        if not fut.done():
             if do_append is None or do_append(resp):
                 responses.append(resp)
             if do_stop is None or do_stop(resp):