chat: ChatDB now correctly ignores files that contain no valid messages

tests/test_chat.py

@@ -2,6 +2,7 @@ import unittest
 import pathlib
 import tempfile
 import time
+import yaml
 from io import StringIO
 from unittest.mock import patch
 from chatmastermind.tags import TagLine
@@ -156,13 +157,24 @@ class TestChatDB(unittest.TestCase):
         next_fname = pathlib.Path(self.db_path.name) / '.next'
         with open(next_fname, 'w') as f:
             f.write('4')
+        # add some "trash" in order to test if it's correctly handled / ignored
+        self.trash_files = ['.config.yaml', 'foo.yaml', 'bla.txt']
+        for file in self.trash_files:
+            with open(pathlib.Path(self.db_path.name) / file, 'w') as f:
+                f.write('test trash')
+        # also create a file with actual yaml content
+        with open(pathlib.Path(self.db_path.name) / 'content.yaml', 'w') as f:
+            yaml.dump({'key': 'value'}, f)
+        self.trash_files.append('content.yaml')
+
+        self.maxDiff = None
 
     def message_list(self, tmp_dir: tempfile.TemporaryDirectory) -> list[pathlib.Path]:
         """
         List all Message files in the given TemporaryDirectory.
         """
         # exclude '.next'
-        return list(pathlib.Path(tmp_dir.name).glob('*.[ty]*'))
+        return [f for f in pathlib.Path(tmp_dir.name).glob('*.[ty]*') if f.name not in self.trash_files]
 
     def tearDown(self) -> None:
         self.db_path.cleanup()