Rewrite fragmented packet detection

rcon/source/client.py

@@ -12,9 +12,7 @@ __all__ = ["Client"]
 class Client(BaseClient, socket_type=SOCK_STREAM):
     """An RCON client."""
 
-    def __init__(
-        self, *args, frag_threshold: int = 4096, frag_detect_cmd: str = "", **kwargs
-    ):
+    def __init__(self, *args, frag_threshold: int = 4096, **kwargs):
         """Set an optional fragmentation threshold and
         command in order to detect fragmented packets.
 
@@ -22,7 +20,6 @@ class Client(BaseClient, socket_type=SOCK_STREAM):
         """
         super().__init__(*args, **kwargs)
         self.frag_threshold = frag_threshold
-        self.frag_detect_cmd = frag_detect_cmd
 
     def communicate(
         self, packet: Packet, raise_unexpected_terminator: bool = False
@@ -44,7 +41,7 @@ class Client(BaseClient, socket_type=SOCK_STREAM):
             if len(response.payload) < self.frag_threshold:
                 return response
 
-            self.send(Packet.make_command(self.frag_detect_cmd))
+            self.send(Packet.make_empty_response())
 
             while (successor := Packet.read(file)).id == response.id:
                 response += successor

rcon/source/proto.py

@@ -180,6 +180,11 @@ class Packet(NamedTuple):
             b" ".join(map(partial(str.encode, encoding=encoding), args)),
         )
 
+    @classmethod
+    def make_empty_response(cls) -> Packet:
+        """Create an empty response packet."""
+        return cls(random_request_id(), Type.SERVERDATA_RESPONSE_VALUE, b"")
+
     @classmethod
     def make_login(cls, passwd: str, *, encoding: str = "utf-8") -> Packet:
         """Create a login packet."""

tests/test_local_minecraft_server.py

@@ -0,0 +1,24 @@
+from unittest import TestCase
+from socket import socket, AF_INET
+
+import pytest
+
+from rcon.source import Client
+
+HOST: str = "localhost"
+PORT: int = 25575
+
+
+class TestLocalMinecraftServer(TestCase):
+    def setUp(self):
+        self.client = Client(HOST, PORT, passwd="test")
+
+    @pytest.mark.skipif(
+        socket(AF_INET).connect_ex((HOST, PORT)) != 0,
+        reason="requires a local Minecraft server to be running",
+    )
+    def test_list_empty(self):
+        with self.client as client:
+            response = client.run("list")
+
+        self.assertEqual(response, "There are 0 of a max of 20 players " "online: ")