Issue #46: implement Python async client values errors and CLI

clients/python/tests/test_errors.py

@@ -0,0 +1,49 @@
+"""Tests for typed command error mapping."""
+
+import json
+from pathlib import Path
+
+import pytest
+from google.protobuf.json_format import ParseDict
+
+from mxgateway.errors import ensure_mxaccess_success, ensure_protocol_success
+from mxgateway import MxAccessError, MxGatewaySessionError
+from mxgateway.generated import mxaccess_gateway_pb2 as pb
+
+FIXTURE_ROOT = Path(__file__).resolve().parents[2] / "proto" / "fixtures" / "behavior"
+
+
+def test_register_fixture_is_protocol_and_mxaccess_success() -> None:
+    reply = _load_reply("command-replies/register.ok.reply.json")
+
+    assert ensure_protocol_success("register", reply.protocol_status, reply) is reply
+    assert ensure_mxaccess_success("register", reply) is reply
+
+
+def test_write_failure_fixture_preserves_raw_reply() -> None:
+    reply = _load_reply("command-replies/write.mxaccess-failure.reply.json")
+
+    assert ensure_protocol_success("write", reply.protocol_status, reply) is reply
+    with pytest.raises(MxAccessError) as captured:
+        ensure_mxaccess_success("write", reply)
+
+    assert captured.value.raw_reply is reply
+    assert captured.value.raw_reply.hresult == -2147220992
+    assert len(captured.value.raw_reply.statuses) == 2
+
+
+def test_session_status_maps_to_session_error() -> None:
+    status = pb.ProtocolStatus(
+        code=pb.PROTOCOL_STATUS_CODE_SESSION_NOT_FOUND,
+        message="session missing",
+    )
+
+    with pytest.raises(MxGatewaySessionError) as captured:
+        ensure_protocol_success("invoke", status)
+
+    assert captured.value.protocol_status is status
+
+
+def _load_reply(name: str) -> pb.MxCommandReply:
+    payload = json.loads((FIXTURE_ROOT / name).read_text(encoding="utf-8"))
+    return ParseDict(payload, pb.MxCommandReply())