Use borehole limit constant

app/routes/ags_export_by_polygon.py

@@ -67,7 +67,7 @@ def ags_export_by_polygon(
     except shapely.errors.GEOSException:
         raise HTTPException(status_code=422, detail="Invalid polygon")
 
-    url = BOREHOLE_INDEX_URL.format(polygon=polygon)
+    url = BOREHOLE_INDEX_URL.format(polygon=polygon, borehole_export_limit=BOREHOLE_EXPORT_LIMIT)
 
     try:
         response = requests.get(url, timeout=10)

app/routes/utils.py

@@ -15,7 +15,7 @@
 BOREHOLE_EXPORT_URL = "https://gwbv.bgs.ac.uk/ags_export?loca_ids={bgs_loca_id}"
 BOREHOLE_INDEX_URL = (
     "https://ogcapi.bgs.ac.uk/collections/agsboreholeindex/items?f=json"
-    "&properties=bgs_loca_id&filter=INTERSECTS(shape,{polygon})&limit=50"
+    "&properties=bgs_loca_id&filter=INTERSECTS(shape,{polygon})&limit={borehole_export_limit}"
 )
 
 log_responses = dict(error_responses)

test/integration/test_ags_export_by_polygon.py

@@ -1,5 +1,6 @@
 """Tests for API responses."""
 from io import BytesIO
+import re
 import zipfile
 
 import pytest
@@ -48,6 +49,37 @@ def test_get_ags_exporter_by_polygon(client, count_only):
                 assert f'Project : {bgs_proj_id}' in metadata_text
 
 
+@pytest.mark.xfail(IN_GITHUB_ACTIONS, reason="Upstream URL not available from Github Actions")
+def test_get_ags_exporter_by_polygon_with_more_than_10_polygons(client):
+    # Arrange
+    # There should be 28 boreholes in this area, this should pass for a limit of 50,
+    # and it should fail for a limit of 10
+    polygon = 'POLYGON((-3.946 56.065,-3.640 56.065,-3.640 55.966,-3.946 55.966,-3.946 56.065))'
+    query = f'{API_VERSION}/ags_export_by_polygon/?polygon={polygon}'
+    ags_metadata_file_name = 'FILE/BGSFileSet01/BGS_download_metadata.txt'
+
+    # Act
+    with client as ac:
+        response = ac.get(query)
+
+    # Assert
+    assert response.status_code == 200
+    assert response.headers["Content-Disposition"] == 'attachment; filename="boreholes.zip"'
+    assert response.headers["Content-Type"] == "application/x-zip-compressed"
+    assert len(response.content) > 0
+
+    assert zipfile.is_zipfile(BytesIO(response.content))
+    with zipfile.ZipFile(BytesIO(response.content)) as ags_zip:
+        # Check that metadata.txt lists 28 loca IDs
+        with ags_zip.open(ags_metadata_file_name) as metadata_file:
+            # find the pattern 20200205093727287902;20200205093727287903;2020...
+            regex = r'\d+(;\d+)+'
+            metadata_text = metadata_file.read().decode()
+            match = re.search(regex, metadata_text)
+            assert match
+            assert len(match.group(0).split(';')) == 28
+
+
 @pytest.mark.parametrize('polygon, count', [
     ('POLYGON((-3.946 56.061,-3.640 56.061,-3.640 55.966,-3.946 55.966,-3.946 56.061))', 0),
     ('POLYGON((-3.946 56.063,-3.640 56.063,-3.640 55.966,-3.946 55.966,-3.946 56.063))', 4),