fix: partition regional land use retrieval

backend/tests/test_sprint194_regional_timeseries.py

@@ -8,6 +8,10 @@ from pathlib import Path
 import sys
 import zipfile
 
+import numpy as np
+import rasterio
+from rasterio.transform import from_origin
+
 
 ROOT = Path(__file__).resolve().parents[2]
 SCRIPTS = ROOT / "scripts"
@@ -98,7 +102,8 @@ def test_regional_coordinator_builds_explicit_population_and_forest_commands(tmp
         max_landuse_features=500000,
     )
 
-    commands = dict(module.build_operator_commands(args, scope, tmp_path / "boundary.geojson"))
+    members_path = tmp_path / "municipalities.geojson"
+    commands = dict(module.build_operator_commands(args, scope, tmp_path / "boundary.geojson", members_path))
 
     assert set(commands) == {"population", "forest"}
     assert commands["population"][0] == sys.executable
@@ -107,6 +112,8 @@ def test_regional_coordinator_builds_explicit_population_and_forest_commands(tmp
     assert scope.project_name in commands["population"]
     assert commands["forest"][0] == sys.executable
     assert "--max-features" in commands["forest"]
+    assert "--partition-boundaries-path" in commands["forest"]
+    assert str(members_path) in commands["forest"]
     assert ",".join(scope.nis_codes) in commands["forest"]
     assert "--force" not in commands["population"]
     assert "--fetch-only" not in commands["forest"]
@@ -128,6 +135,39 @@ def test_regional_forest_provenance_does_not_claim_one_municipality() -> None:
     assert municipal["nis_code"] == "13025"
 
 
+def test_regional_forest_partition_rasters_merge_without_resolution_loss(tmp_path: Path) -> None:
+    module = load_script("provision_official_landuse_timeseries.py")
+    left = tmp_path / "left.tif"
+    right = tmp_path / "right.tif"
+    profile = {
+        "driver": "GTiff",
+        "height": 2,
+        "width": 2,
+        "count": 1,
+        "dtype": "uint8",
+        "crs": "EPSG:31370",
+        "transform": from_origin(100000, 200000, 10, 10),
+        "nodata": 0,
+    }
+    with rasterio.open(left, "w", **profile) as target:
+        target.write(np.full((1, 2, 2), 12, dtype="uint8"))
+    with rasterio.open(
+        right,
+        "w",
+        **{**profile, "transform": from_origin(100020, 200000, 10, 10)},
+    ) as target:
+        target.write(np.full((1, 2, 2), 17, dtype="uint8"))
+
+    destination = tmp_path / "regional.tif"
+    result = module.merge_partition_rasters([left, right], destination)
+
+    assert result["width"] == 4
+    assert result["height"] == 2
+    assert result["resolution_metres"] == 10.0
+    with rasterio.open(destination) as merged:
+        assert merged.read(1).tolist() == [[12, 12, 17, 17], [12, 12, 17, 17]]
+
+
 def test_regional_timeseries_operator_is_packaged_and_release_checked() -> None:
     dockerfile = (ROOT / "deploy/unraid/Dockerfile.all-in-one").read_text(encoding="utf-8")
     readiness = (ROOT / "scripts/run_readiness_check.sh").read_text(encoding="utf-8")