client: add set_self_deaf server notification

tests/test_client.py

@@ -1,5 +1,7 @@
 """Tests for MumbleClient dispatcher and callback wiring."""
 
+from unittest.mock import MagicMock
+
 from tuimble.client import MumbleClient
 
 
@@ -39,3 +41,29 @@ def test_dispatch_skips_none_callback():
     client = MumbleClient(host="localhost")
     # Should not raise
     client._dispatch(None)
+
+
+def test_set_self_deaf_calls_pymumble():
+    client = MumbleClient(host="localhost")
+    client._connected = True
+    myself = MagicMock()
+    users = MagicMock()
+    users.myself = myself
+    mumble = MagicMock()
+    mumble.users = users
+    client._mumble = mumble
+
+    client.set_self_deaf(True)
+    myself.deafen.assert_called_once()
+    myself.undeafen.assert_not_called()
+
+    myself.reset_mock()
+    client.set_self_deaf(False)
+    myself.undeafen.assert_called_once()
+    myself.deafen.assert_not_called()
+
+
+def test_set_self_deaf_noop_when_disconnected():
+    client = MumbleClient(host="localhost")
+    # Should not raise when not connected
+    client.set_self_deaf(True)