Add test using MockTransport

test.py

@@ -3147,6 +3147,21 @@ def test_fairy_sf_initialize(self):
         with chess.engine.SimpleEngine.popen_uci("fairy-stockfish", setpgrp=True, debug=True):
             pass
 
+    def test_uci_option_parse(self):
+        async def main():
+            protocol = chess.engine.UciProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("uci", ["option name UCI_Variant type combo default chess var bughouse var chess var mini var minishogi var threekings", "uciok"])
+            await protocol.initialize()
+            mock.assert_done()
+
+            mock.expect("isready", ["readyok"])
+            await protocol.ping()
+            mock.assert_done()
+
+        asyncio.run(main())
+
     @catchAndSkip(FileNotFoundError, "need crafty")
     def test_crafty_play_to_mate(self):
         logging.disable(logging.WARNING)