Expand failed regional building contexts

backend/tests/test_belgium_training_portfolio.py

@@ -32,3 +32,19 @@ def test_portfolio_bbox_is_metric_sized() -> None:
     bounds = to_metric.transform_bounds(bbox["min_x"], bbox["min_y"], bbox["max_x"], bbox["max_y"])
     assert 255 <= bounds[2] - bounds[0] <= 258
     assert 255 <= bounds[3] - bounds[1] <= 258
+
+
+def test_failure_driven_expansion_is_train_only_and_context_complete() -> None:
+    additions = [aoi for aoi in module.AOIS if aoi.slug.endswith("-v31") or "-v31-bg" in aoi.slug]
+    assert len(additions) == 18
+    assert {aoi.split for aoi in additions} == {"train"}
+    assert {aoi.region for aoi in additions} == {"flanders", "wallonia"}
+    contexts = {(aoi.region, aoi.context) for aoi in additions}
+    assert {
+        ("flanders", "industrial"),
+        ("flanders", "ribbon-development"),
+        ("flanders", "coastal-urban"),
+        ("wallonia", "dense-urban"),
+        ("wallonia", "rural-town"),
+        ("wallonia", "regional-architecture"),
+    } <= contexts