added ruff test

apps/autocal/tests/test_locales_autocal.py

@@ -11,7 +11,6 @@ import json
 from pathlib import Path
 
 import pytest
-
 from orisys_autocal.preferences import load_preferences
 
 LOCALES = Path(__file__).resolve().parents[1] / "config" / "locales"
@@ -44,7 +43,7 @@ def test_locales_have_identical_key_sets():
         other = _flatten(_load(language))
         assert other == reference, {
             f"{language}_only": sorted(other - reference),
-            f"zh_CN_only": sorted(reference - other),
+            "zh_CN_only": sorted(reference - other),
         }
 
 
@@ -89,6 +88,40 @@ def test_the_shipped_defaults_carry_the_controller_task_number():
     assert shipped["bas_task"] == DEFAULT_BAS_TASK == 4
 
 
+def test_a_stored_block_without_a_new_limit_still_gets_it():
+    """The upgrade path for a real preference file, which is merged one level deep.
+
+    A stored ``safety_limits`` replaces the whole default block, so a limit added
+    later would read as "not set" — and motion is refused for a limit the operator
+    cannot see anywhere in the file. Filling the block key by key is what stops that.
+    """
+    from orisys_app_shared.paths import preference_path
+
+    from orisys_autocal.preferences import load_preferences
+
+    path = preference_path()
+    path.parent.mkdir(parents=True, exist_ok=True)
+    # A file written before the stage limits existed, with a chosen travel limit.
+    path.write_text(
+        json.dumps(
+            {
+                "safety_limits": {"max_travel_mm": 42.0},
+                "sensor_setup": {"press_axis": 4},
+                "axis_roles": {"x": 0, "y": 1, "pitch": 2, "yaw": 3},
+            }
+        ),
+        encoding="utf-8",
+    )
+    prefs = load_preferences()
+    limits = prefs["safety_limits"]
+    assert limits["max_travel_mm"] == 42.0, "a chosen limit was overwritten"
+    assert limits["max_yaw_deg"] > 0 and limits["max_pitch_deg"] > 0
+    assert limits["contact_search_mm"] > 0
+    # The old duplicate press axis moves into the mapping, and the key goes.
+    assert prefs["axis_roles"]["z"] == 4
+    assert "press_axis" not in prefs["sensor_setup"]
+
+
 def _walk(node, prefix: str = ""):
     for key, value in node.items():
         path = f"{prefix}{key}"