release: bump version to 0.52.0

backend/tests/test_layers.py

@@ -0,0 +1,44 @@
+from fastapi import HTTPException
+
+from app.api.v1 import layers
+
+
+def test_layer_guard_requires_bbox():
+    try:
+        layers._parse_layer_bbox("")
+    except HTTPException as exc:
+        assert exc.status_code == 400
+    else:
+        raise AssertionError("Expected missing bbox to fail")
+
+
+def test_layer_guard_filters_bbox_and_clamps_low_zoom_limit():
+    geojson = {
+        "type": "FeatureCollection",
+        "features": [
+            {
+                "type": "Feature",
+                "geometry": {"type": "Point", "coordinates": [121.0, 31.0]},
+                "properties": {"id": "inside"},
+            },
+            {
+                "type": "Feature",
+                "geometry": {"type": "Point", "coordinates": [10.0, 10.0]},
+                "properties": {"id": "outside"},
+            },
+        ],
+    }
+
+    result = layers._guard_geojson_layer(
+        geojson,
+        bbox=(120.0, 30.0, 122.0, 32.0),
+        zoom=2,
+        limit=6000,
+    )
+
+    assert result["returned_count"] == 1
+    assert result["visible_count"] == 1
+    assert result["features"][0]["properties"]["id"] == "inside"
+    assert result["diagnostics"]["limit"] == layers.LOW_ZOOM_FEATURE_LIMIT
+    assert result["diagnostics"]["limit_clamped"] is True
+    assert result["diagnostics"]["degraded"] is True