Move XBoard opponent tests to own method

Author: MarkZH

test.py

@@ -3542,14 +3542,8 @@ async def main():
             board.push_san("d4")
             board.push_san("Nf6")
             board.push_san("c4")
-            opponent = chess.engine.Opponent("Turk", "Mechanical", 2100, True)
-            engine_rating = 3600
-            await protocol.send_opponent_information(opponent=opponent, engine_rating=engine_rating)
 
             mock.expect("new")
-            mock.expect("name Mechanical Turk")
-            mock.expect("rating 3600 2100")
-            mock.expect("computer")
             mock.expect("force")
             mock.expect("d2d4")
             mock.expect("g8f6")
@@ -3595,6 +3589,55 @@ async def main():
         asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
+    def test_xboard_opponent(self):
+        async def main():
+            protocol = chess.engine.XBoardProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("xboard")
+            mock.expect("protover 2", ["feature ping=1 setboard=1 name=1 done=1"])
+            await protocol.initialize()
+            mock.assert_done()
+
+            limit = chess.engine.Limit(time=5)
+            board = chess.Board()
+            opponent = chess.engine.Opponent("Turk", "Mechanical", 2100, True)
+            await protocol.send_opponent_information(opponent=opponent, engine_rating=3600)
+
+            mock.expect("new")
+            mock.expect("name Mechanical Turk")
+            mock.expect("rating 3600 2100")
+            mock.expect("computer")
+            mock.expect("force")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move e2e4"])
+            mock.expect_ping()
+            result = await protocol.play(board, limit, game="game")
+            self.assertEqual(result.move, board.parse_san("e4"))
+            mock.assert_done()
+
+            new_opponent = chess.engine.Opponent("Turochamp", None, 800, True)
+            board.push(result.move)
+            mock.expect("new")
+            mock.expect("name Turochamp")
+            mock.expect("rating 3600 800")
+            mock.expect("computer")
+            mock.expect("force")
+            mock.expect("e2e4")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move e7e5"])
+            mock.expect_ping()
+            result = await protocol.play(board, limit, game="game", opponent=new_opponent)
+            self.assertEqual(result.move, board.parse_san("e5"))
+            mock.assert_done()
+
+        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
+        asyncio.run(main())
+
     def test_xboard_analyse(self):
         async def main():
             protocol = chess.engine.XBoardProtocol()