Check that no further data was received in Client.is_omp()

Author: Cheaterman

samp_query/__init__.py

@@ -174,7 +174,8 @@ async def is_omp(self) -> bool:
         with trio.move_on_after(2 * ping):
             await self.send(b'o', payload)
             assert self.prefix
-            await self.receive(header=self.prefix + b'o' + payload)
+            data = await self.receive(header=self.prefix + b'o' + payload)
+            assert not data  # No data beyond expected header
             return True
 
         return False