qa: lib/tests/zodb += zurl_normalize_main

After moving zurl filtering to a dedicated function, we can
now test this function for correctness. It's important that different
clients which point to the same storage always result in the same
zodburi, even if their initial user-specified zodburi slightly differs
(e.g. due to different client-side parameters or different paths of encryption).

lib/tests/test_zodb.py

+# -*- coding: utf-8 -*-
 # Wendelin.core.bigfile | Tests for ZODB utilities and critical properties of ZODB itself
 # Copyright (C) 2014-2022  Nexedi SA and Contributors.
 #                          Kirill Smelkov <kirr@nexedi.com>
@@ -17,7 +18,7 @@
 #
 # See COPYING file for full licensing terms.
 # See https://www.nexedi.com/licensing for rationale and options.
-from wendelin.lib.zodb import LivePersistent, deactivate_btree, dbclose, zconn_at, zstor_2zurl, zmajor, _zhasNXDPatch, dbstoropen
+from wendelin.lib.zodb import LivePersistent, deactivate_btree, dbclose, zconn_at, zstor_2zurl, zmajor, _zhasNXDPatch, dbstoropen, zurl_normalize_main
 from wendelin.lib.testing import getTestDB
 from wendelin.lib import testing
 from persistent import Persistent, UPTODATE, GHOST, CHANGED
@@ -541,6 +542,37 @@ def test_zstor_2zurl(tmpdir, neo_ssl_dict):
         zstor_2zurl("I am not a storage.")
 
 
+@pytest.mark.parametrize(
+    "zurl,zurl_norm_ok",
+    [
+        # FileStorage
+        ("file://Data.fs", "file://Data.fs"),
+        # ZEO
+        ("zeo://localhost:9001", "zeo://localhost:9001"),
+        # NEO
+        ("neo://127.0.0.1:1234/cluster", "neo://127.0.0.1:1234/cluster"),
+        #   > 1 master nodes \w different order
+        ("neo://abc:1,def:2/cluster", "neo://abc:1,def:2/cluster"),
+        ("neo://def:2,abc:1/cluster", "neo://abc:1,def:2/cluster"),
+        #   Different SSL paths
+        ("neos://ca=a&key=b&cert=c@xyz:1/cluster", "neos://xyz:1/cluster"),
+        ("neos://ca=α&key=β&cert=γ@xyz:1/cluster", "neos://xyz:1/cluster"),
+    ],
+)
+def test_zurl_normalize_main(zurl, zurl_norm_ok):
+    assert zurl_normalize_main(zurl) == zurl_norm_ok
+    # also verify that zurl_normalize is stable
+    assert zurl_normalize_main(zurl_norm_ok) == zurl_norm_ok
+
+
+# 'zurl_normalize' must explicitly raise an exception if an unsupported
+# zodburi scheme is used.
+def test_zurl_normalize_main_invalid_scheme():
+    for uri in "https://test postgres://a:b@c:5432/d".split(" "):
+        with pytest.raises(NotImplementedError):
+            zurl_normalize_main(uri)
+
+
 # neo_ssl_dict returns the path of precomputed static ssl certificate
 # files.
 @pytest.fixture