require effective config for slots ttl

agent/nix_builder_autoscaler/tests/test_cli.py

@@ -7,7 +7,13 @@ from datetime import UTC, datetime, timedelta
 import pytest
 
 from nix_builder_autoscaler import cli
-from nix_builder_autoscaler.cli import _parse_args, _print_slots, _print_status_summary, _slot_ttl
+from nix_builder_autoscaler.cli import (
+    _get_effective_config,
+    _parse_args,
+    _print_slots,
+    _print_status_summary,
+    _slot_ttl,
+)
 
 
 def test_parse_args_without_command_prints_help_and_exits_zero(
@@ -149,3 +155,15 @@ def test_print_slots_includes_ttl_column(capsys: pytest.CaptureFixture[str]) ->
     out = capsys.readouterr().out
     assert "ttl" in out
     assert "slot001" in out
+
+
+def test_get_effective_config_raises_on_non_2xx(monkeypatch: pytest.MonkeyPatch) -> None:
+    def _fake_request(socket_path: str, method: str, path: str, body=None):  # noqa: ANN001
+        assert socket_path == "/tmp/sock"
+        assert method == "GET"
+        assert path == "/v1/config/effective"
+        return 404, {"error": "not found"}
+
+    monkeypatch.setattr(cli, "_uds_request", _fake_request)
+    with pytest.raises(RuntimeError, match="failed to fetch effective config"):
+        _get_effective_config("/tmp/sock")