Scope bounded coverage to persisted extents

backend/tests/test_rc4_national_coverage.py

@@ -180,6 +180,47 @@ def test_statbel_population_materialization_does_not_masquerade_as_admin_data()
     assert population.materialized_dataset_ids == [statbel_id]
 
 
+def test_bounded_api_materialization_only_covers_its_persisted_bbox() -> None:
+    project_id = uuid4()
+    dataset_id = uuid4()
+    dataset = SimpleNamespace(
+        id=dataset_id,
+        status="ready",
+        source_name="spw_picc",
+        reference_layer_name="buildings",
+        source_metadata={
+            "coverage_zones": ["wallonia"],
+            "bbox_epsg4326": [4.55, 50.58, 4.56, 50.59],
+        },
+    )
+    session = FakeSession(
+        project=SimpleNamespace(id=project_id),
+        areas=[
+            scope_area("Belgium land", box(2.5, 49.5, 6.4, 51.5)),
+            scope_area("Wallonia", box(2.5, 49.5, 6.4, 50.8)),
+        ],
+        datasets=[dataset],
+    )
+
+    inside = CoverageRegistryService.resolve(
+        session,
+        project_id,
+        CoverageBBox(minx=4.551, miny=50.581, maxx=4.559, maxy=50.589),
+        ["buildings"],
+    )
+    outside = CoverageRegistryService.resolve(
+        session,
+        project_id,
+        CoverageBBox(minx=4.7, miny=50.6, maxx=4.71, maxy=50.61),
+        ["buildings"],
+    )
+
+    assert inside.items[0].status == "operational"
+    assert inside.items[0].materialized_dataset_ids == [dataset_id]
+    assert outside.items[0].status == "partial"
+    assert outside.items[0].materialized_dataset_ids == []
+
+
 def test_mixed_land_and_north_sea_selection_remains_split() -> None:
     project_id = uuid4()
     project = SimpleNamespace(id=project_id)