tests(server): Return list for (attached_)sessions

Author: tony

tests/test_server.py

@@ -123,3 +123,13 @@ def test_new_session_shell(server: Server) -> None:
         assert pane_start_command.replace('"', "") == cmd
     else:
         assert pane_start_command == cmd
+
+
+def test_sessions_no_server() -> None:
+    server = Server(socket_name="test_attached_session_no_server")
+    assert server.sessions == []
+
+
+def test_attached_sessions_no_server() -> None:
+    server = Server(socket_name="test_attached_session_no_server")
+    assert server.attached_sessions == []