Supervise checkpointed Tower training

backend/tests/test_yolo_training_supervisor.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+SCRIPT = Path(__file__).parents[2] / "scripts" / "supervise_container_yolo_training.py"
+SPEC = importlib.util.spec_from_file_location("yolo_supervisor", SCRIPT)
+assert SPEC and SPEC.loader
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+
+
+def test_training_active_requires_yolo_train_and_exact_marker(monkeypatch) -> None:
+    class Result:
+        returncode = 0
+        stdout = "python api.py\npython3 /opt/venv/bin/yolo train resume=/runs/v37/weights/last.pt device=0\n"
+
+    monkeypatch.setattr(MODULE.subprocess, "run", lambda *args, **kwargs: Result())
+    assert MODULE.training_active("geointel", "/runs/v37") is True
+    assert MODULE.training_active("geointel", "/runs/v38") is False
+
+
+def test_container_running_fails_closed_on_inspect_error(monkeypatch) -> None:
+    class Result:
+        returncode = 1
+        stdout = ""
+
+    monkeypatch.setattr(MODULE.subprocess, "run", lambda *args, **kwargs: Result())
+    assert MODULE.container_running("missing") is False