fix(client): Ensure that the bus is connected before pairing

If pairing is attempted before the bus is connected, the pairing process fails due to an exception being raised.

AUTHORS.rst

@@ -24,6 +24,7 @@ Contributors
 * David Johansen <[email protected]>
 * JP Hutchins <[email protected]>
 * Bram Duvigneau <[email protected]>
+* Peter-Newman Messan <[email protected]>
 
 Sponsors
 --------

CHANGELOG.rst

@@ -10,6 +10,10 @@ and this project adheres to `Semantic Versioning <https://semver.org/spec/v2.0.0
 `Unreleased`_
 =============
 
+Fixed
+-------
+* Fixed uninitialized bus connection when pairing before connection on BlueZ backend.
+
 `0.22.3`_ (2024-10-05)
 ======================
 

bleak/backends/bluezdbus/client.py

@@ -436,6 +436,11 @@ async def pair(self, *args, **kwargs) -> bool:
             Boolean regarding success of pairing.
 
         """
+        if self._bus is None:
+            self._bus = await MessageBus(
+                bus_type=BusType.SYSTEM, negotiate_unix_fd=True
+            ).connect()
+
         # See if it is already paired.
         reply = await self._bus.call(
             Message(