correct overlapping checkpoint evaluation

backend/tests/test_sprint129_operator_yolo_training_dataset.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+import shlex
 import subprocess
 import sys
 
@@ -8,7 +9,9 @@ ROOT = Path(__file__).resolve().parents[2]
 
 def test_operator_yolo_dataset_export_script_contract() -> None:
     script_path = ROOT / "scripts" / "export_operator_yolo_dataset.py"
-    readiness = (ROOT / "scripts" / "run_readiness_check.sh").read_text(encoding="utf-8")
+    readiness = (ROOT / "scripts" / "run_readiness_check.sh").read_text(
+        encoding="utf-8"
+    )
 
     assert script_path.exists()
     script = script_path.read_text(encoding="utf-8")
@@ -42,14 +45,18 @@ def test_operator_yolo_dataset_export_help_does_not_require_gis_dependencies() -
     )
 
     assert result.returncode == 0
-    assert "Export operator real-data samples to a YOLO detection dataset" in result.stdout
+    assert (
+        "Export operator real-data samples to a YOLO detection dataset" in result.stdout
+    )
     assert "--manifest-path" in result.stdout
     assert "--val-samples" in result.stdout
 
 
 def test_operator_yolo_train_smoke_script_contract() -> None:
     script_path = ROOT / "scripts" / "train_operator_yolo_detector.sh"
-    readiness = (ROOT / "scripts" / "run_readiness_check.sh").read_text(encoding="utf-8")
+    readiness = (ROOT / "scripts" / "run_readiness_check.sh").read_text(
+        encoding="utf-8"
+    )
 
     assert script_path.exists()
     script = script_path.read_text(encoding="utf-8")
@@ -62,7 +69,7 @@ def test_operator_yolo_train_smoke_script_contract() -> None:
     assert "TRAIN_EPOCHS" in script
     assert "TRAIN_IMGSZ" in script
     assert "/opt/geointel/venv/bin/python" in script
-    assert "PYTHON_BIN=\"python3\"" in script
+    assert 'PYTHON_BIN="python3"' in script
     assert "dataset.yaml" in script
     assert "from ultralytics import YOLO" in script
     assert "model.train" in script
@@ -76,6 +83,42 @@ def test_operator_yolo_train_smoke_script_contract() -> None:
     assert '"base_model_sha256"' in script
     assert '"trained_model_sha256"' in script
     assert "training_release_manifest.py" in script
+    assert "NO_TRAINING.json" in script
+    assert "Training is prohibited for this evaluation-only dataset" in script
     assert "verify" in script
     assert "download" not in script.lower()
     assert "fixture_mode" not in script
+
+
+def test_operator_yolo_train_rejects_evaluation_only_marker(tmp_path: Path) -> None:
+    dataset_dir = tmp_path / "evaluation-only"
+    dataset_dir.mkdir()
+    (dataset_dir / "dataset.yaml").write_text("val: images/val\n", encoding="utf-8")
+    (dataset_dir / "NO_TRAINING.json").write_text(
+        '{"training_prohibited": true}\n', encoding="utf-8"
+    )
+
+    def shell_path(path: Path) -> str:
+        if path.drive:
+            return f"/mnt/{path.drive[0].lower()}/{path.as_posix()[3:]}"
+        return str(path)
+
+    dataset_shell_path = shell_path(dataset_dir)
+    model_shell_path = shell_path(tmp_path / "missing.pt")
+    script_shell_path = shell_path(ROOT / "scripts" / "train_operator_yolo_detector.sh")
+    command = (
+        f"OPERATOR_YOLO_DATASET_DIR={shlex.quote(dataset_shell_path)} "
+        f"YOLO_BASE_MODEL_PATH={shlex.quote(model_shell_path)} "
+        f"bash {shlex.quote(script_shell_path)}"
+    )
+
+    result = subprocess.run(
+        ["bash", "-lc", command],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+    assert result.returncode == 1
+    assert "Training is prohibited for this evaluation-only dataset" in result.stderr
+    assert "Base model file not found" not in result.stderr