test: add case for legacy restart interrupted being likely successful

repeater/service_utils.py

@@ -294,14 +294,17 @@ def restart_service() -> Tuple[bool, str]:
                 logger.info("Service restart via legacy fallback succeeded (%s)", reason)
                 return True, "Service restart initiated (legacy fallback)"
             if legacy.returncode < 0:
+                # When running inside the service cgroup, a direct restart can
+                # terminate this process before subprocess.run returns. Treat
+                # termination by signal as likely success.
                 logger.warning(
-                    "Legacy restart interrupted (%s) after %s",
+                    "Legacy restart interrupted by signal (%s) after %s; treating as likely success",
                     legacy.returncode,
                     reason,
                 )
                 return (
-                    False,
+                    True,
-                    "Restart unconfirmed: legacy fallback interrupted; check service status",
+                    "Service restart likely initiated (legacy fallback interrupted by signal)",
                 )
             legacy_err = legacy.stderr.strip() or f"exit status {legacy.returncode}"
             return False, f"legacy fallback failed: {legacy_err}"

tests/test_restart_job_submission.py

@@ -84,6 +84,24 @@ def test_non_root_denied_schedule_retries_legacy_and_succeeds(monkeypatch):
     assert run.call_count == 2
 
 
+def test_non_root_denied_schedule_legacy_interrupted_is_likely_success(monkeypatch):
+    monkeypatch.setattr(su.os, "geteuid", lambda: 1000)
+    monkeypatch.setattr(su.os.path, "exists", lambda p: p == su._SUDO_SYSTEMCTL_BIN)
+    run = Mock(
+        side_effect=[
+            subprocess.CompletedProcess([], 1, "", "sudo: a password is required"),
+            subprocess.CompletedProcess([], -15, "", ""),
+        ]
+    )
+    monkeypatch.setattr(su.subprocess, "run", run)
+
+    ok, message = su.restart_service()
+
+    assert ok is True
+    assert "likely initiated" in message
+    assert run.call_count == 2
+
+
 def test_installer_authorizes_only_fixed_restart_timer_command():
     script = (Path(__file__).resolve().parents[1] / "manage.sh").read_text()
     rules = [line for line in script.splitlines() if "NOPASSWD:" in line]