Properly terminate Rpc and remove sleep() hack

deltachat-rpc-client/src/deltachat_rpc_client/pytestplugin.py

@@ -44,7 +44,6 @@ async def rpc(tmp_path) -> AsyncGenerator:
     env = {**os.environ, "DC_ACCOUNTS_PATH": str(tmp_path / "accounts")}
     async with start_rpc_server(env=env) as rpc:
         yield rpc
-    await asyncio.sleep(0.1)  # avoid RuntimeError: Event loop is closed
 
 
 @pytest_asyncio.fixture

deltachat-rpc-client/src/deltachat_rpc_client/rpc.py

@@ -37,6 +37,11 @@ class Rpc:
             else:
                 print(response)
 
+    async def close(self) -> None:
+        """Terminate RPC server process and wait until the reader loop finishes."""
+        self.process.terminate()
+        await self.reader_task
+
     async def wait_for_event(self, account_id: int) -> Optional[dict]:
         """Waits for the next event from the given account and returns it."""
         if account_id in self.event_queues:
@@ -84,4 +89,4 @@ async def start_rpc_server(*args, **kwargs) -> AsyncGenerator:
     try:
         yield rpc
     finally:
-        proc.terminate()
+        await rpc.close()