Fix visibility hidden edge case

.uncover-agent/NOTE.txt

@@ -0,0 +1,3 @@
+# uncover-agent test diff
+# original: https://github.com/geopython/pygeoapi/pull/2330
+# generated 2026-10-21 09:29:36 UTC

.uncover-agent/added.py

@@ -0,0 +1,40 @@
+        if v.get('visibility', 'default') == 'hidden' \
+                and dataset is None:
+@pytest.fixture()
+def config_exclusively_hidden_resources():
+    filename = 'pygeoapi-test-config-exclusively-hidden-resources.yml'
+    with open(get_test_file_path(filename)) as fh:
+        return yaml_load(fh)
+
+
+@pytest.fixture()
+def api_exclusively_hidden_resources(config_exclusively_hidden_resources, openapi): # noqa
+    '''Returns an API instance where all resources are marked as hidden'''
+    return API(config_exclusively_hidden_resources, openapi)
+
+
+def test_describe_collections_with_only_hidden_resources(
+    api_exclusively_hidden_resources
+):
+    '''
+    Test an API with only hidden resources to ensure
+    there are no indexing errors when no collections are returned
+    '''
+    req = mock_api_request({})
+    _, code, response = describe_collections(api_exclusively_hidden_resources, req)  # noqa
+    assert code == HTTPStatus.OK
+
+    collections = json.loads(response)
+    assert len(collections['collections']) == 0, \
+        'All collections are hidden so there should be none in the response'
+
+    hidden_collection_name = 'objects'
+    _, code, response = describe_collections(
+        api_exclusively_hidden_resources, req, hidden_collection_name
+    )
+
+    assert code == HTTPStatus.OK
+    collection = json.loads(response)
+    assert collection['title'] == 'GeoJSON objects', \
+        'The collection should have its normal title even if hidden'
+