refact: reorganize utility modules

tests/unit/test_ads.py

@@ -0,0 +1,29 @@
+"""
+SPDX-FileCopyrightText: © Sebastian Thomschke and contributors
+SPDX-License-Identifier: AGPL-3.0-or-later
+SPDX-ArtifactOfProjectHomePage: https://github.com/Second-Hand-Friends/kleinanzeigen-bot/
+"""
+from kleinanzeigen_bot import ads
+
+
+def test_calculate_content_hash_with_none_values() -> None:
+    """Test calculate_content_hash with None values in the ad configuration."""
+    ad_cfg = {
+        # Minimal configuration with None values as described in bug report
+        "id": "123456789",
+        "created_on": "2022-07-19T07:30:20.489289",
+        "updated_on": "2025-01-22T19:46:46.735896",
+        "title": "Test Ad",
+        "description": "Test Description",
+        "images": [None, "/path/to/image.jpg", None],  # List containing None values
+        "shipping_options": None,  # None instead of list
+        "special_attributes": None,  # None instead of dictionary
+        "contact": {
+            "street": None  # None value in contact
+        }
+    }
+
+    # Should not raise TypeError
+    hash_value = ads.calculate_content_hash(ad_cfg)
+    assert isinstance(hash_value, str)
+    assert len(hash_value) == 64  # SHA-256 hash is 64 characters long