clean_housenumbers: make kinds and delimiters configurable

Also adds unit tests for various options.

test/python/tokenizer/sanitizers/test_clean_housenumbers.py

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file is part of Nominatim. (https://nominatim.org)
+#
+# Copyright (C) 2022 by the Nominatim developer community.
+# For a full list of authors see the git log.
+"""
+Tests for the sanitizer that normalizes housenumbers.
+"""
+import pytest
+
+from nominatim.tokenizer.place_sanitizer import PlaceSanitizer
+from nominatim.indexer.place_info import PlaceInfo
+
+@pytest.fixture
+def sanitize(request):
+    sanitizer_args = {'step': 'clean-housenumbers'}
+    for mark in request.node.iter_markers(name="sanitizer_params"):
+        sanitizer_args.update({k.replace('_', '-') : v for k,v in mark.kwargs.items()})
+
+    def _run(**kwargs):
+        place = PlaceInfo({'address': kwargs})
+        _, address = PlaceSanitizer([sanitizer_args]).process_names(place)
+
+        return sorted([(p.kind, p.name) for p in address])
+
+    return _run
+
+
+def test_simple_number(sanitize):
+    assert sanitize(housenumber='34') == [('housenumber', '34')]
+
+
+@pytest.mark.parametrize('number', ['1;2;3', '1,2,3', '1; 3 ,2',
+                                    '2,,3,1', '1;2;3;;', ';3;2;1'])
+def test_housenumber_lists(sanitize, number):
+    assert sanitize(housenumber=number) == \
+           [('housenumber', '1'), ('housenumber', '2'), ('housenumber', '3')]
+
+
+@pytest.mark.sanitizer_params(filter_kind=('number', 'streetnumber'))
+def test_filter_kind(sanitize):
+    assert sanitize(housenumber='34', number='4', badnumber='65') == \
+            [('badnumber', '65'), ('housenumber', '34'), ('housenumber', '4')]