release: bump version to 0.53.0

backend/tests/test_layers.py

@@ -1,4 +1,5 @@
 from fastapi import HTTPException
+import pytest
 
 from app.api.v1 import layers
 
@@ -42,3 +43,28 @@ def test_layer_guard_filters_bbox_and_clamps_low_zoom_limit():
     assert result["diagnostics"]["limit"] == layers.LOW_ZOOM_FEATURE_LIMIT
     assert result["diagnostics"]["limit_clamped"] is True
     assert result["diagnostics"]["degraded"] is True
+
+
+@pytest.mark.asyncio
+async def test_vessel_layer_snapshot_passes_type_filter(monkeypatch):
+    captured = {}
+
+    async def fake_build_vessel_snapshot_response(db, **kwargs):
+        captured.update(kwargs)
+        return {"type": "FeatureCollection", "features": []}
+
+    monkeypatch.setattr(layers, "build_vessel_snapshot_response", fake_build_vessel_snapshot_response)
+
+    result = await layers.get_vessel_layer_snapshot(
+        bbox="10,59,11,60",
+        zoom=12,
+        limit=1000,
+        vessel_type="cargo",
+        since_minutes=30,
+        db=object(),
+    )
+
+    assert result["features"] == []
+    assert captured["bbox"] == (10.0, 59.0, 11.0, 60.0)
+    assert captured["type_filter"] == "cargo"
+    assert "vessel_type" not in captured