test: cover mcp config rpc server path

tests/wf_transport_rpc_http/test_cli.py

@@ -183,3 +183,37 @@ def test_rpc_server_cli_rejects_mcp_config_with_store_root(tmp_path) -> None:
 
     assert result.exit_code != 0
     assert "--mcp-config cannot be combined with --store-root" in result.output
+
+
+def test_rpc_server_cli_mcp_config_builds_registry_capable_server(monkeypatch, tmp_path) -> None:
+    config_path = tmp_path / "wf_mcp.config.json"
+    config_path.write_text(
+        json.dumps(
+            {
+                "store_root": str(tmp_path / "store"),
+                "connections": [],
+            }
+        ),
+        encoding="utf-8",
+    )
+    captured: dict[str, object] = {}
+
+    def fake_create_rpc_app(server, *, rpc_path="/rpc"):
+        captured["source_registry_admin"] = server.source_registry_admin
+        captured["rpc_path"] = rpc_path
+        return object()
+
+    def fake_uvicorn_run(app_obj, *, host, port, access_log):
+        captured["host"] = host
+        captured["port"] = port
+
+    monkeypatch.setattr("wf_transport_rpc_http.cli.create_rpc_app", fake_create_rpc_app)
+    monkeypatch.setattr("wf_transport_rpc_http.cli.uvicorn.run", fake_uvicorn_run)
+
+    result = CliRunner().invoke(app, ["--mcp-config", str(config_path)])
+
+    assert result.exit_code == 0, result.output
+    assert captured["source_registry_admin"] is not None
+    assert captured["rpc_path"] == "/rpc"
+    assert captured["host"] == "127.0.0.1"
+    assert captured["port"] == 8765