diff --git a/tests/postparser_author_info.py b/tests/postparser_author_info.py
new file mode 100644
index 0000000..dab2109
--- /dev/null
+++ b/tests/postparser_author_info.py
@@ -0,0 +1,93 @@
+# pylint: disable=protected-access, wrong-import-position
+
+import unittest
+from unittest.mock import MagicMock
+import sys
+import os
+# Add project root to sys.path to find post_parser
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+
+# Mock the config module
+sys.modules['config'] = __import__('tests.mock_config', fromlist=['get_settings'])
+
+from pyrogram.types import Message
+from post_parser import PostParser
+
+class TestPostParserGetAuthorInfo(unittest.TestCase):
+    def setUp(self):
+        self.client_mock = MagicMock()
+        self.parser = PostParser(self.client_mock)
+
+    def _mock_message(self, sender_chat=None, from_user=None):
+        message = MagicMock(spec=Message)
+        message.sender_chat = sender_chat
+        message.from_user = from_user
+        return message
+
+    def test_sender_chat_with_username(self):
+        sender_chat = MagicMock()
+        sender_chat.title = 'Test Channel'
+        sender_chat.username = 'testchannel'
+        message = self._mock_message(sender_chat=sender_chat)
+        self.assertEqual(self.parser._get_author_info(message), 'Test Channel (@testchannel)')
+
+    def test_sender_chat_without_username(self):
+        sender_chat = MagicMock()
+        sender_chat.title = 'No Username Channel'
+        sender_chat.username = None
+        message = self._mock_message(sender_chat=sender_chat)
+        self.assertEqual(self.parser._get_author_info(message), 'No Username Channel')
+
+    def test_sender_chat_empty_title(self):
+        sender_chat = MagicMock()
+        sender_chat.title = None
+        sender_chat.username = 'testchannel'
+        message = self._mock_message(sender_chat=sender_chat)
+        self.assertEqual(self.parser._get_author_info(message), '@testchannel')
+
+    def test_from_user_with_username(self):
+        from_user = MagicMock()
+        from_user.first_name = 'John'
+        from_user.last_name = 'Doe'
+        from_user.username = 'johndoe'
+        message = self._mock_message(from_user=from_user)
+        self.assertEqual(self.parser._get_author_info(message), 'John Doe (@johndoe)')
+
+    def test_from_user_without_username(self):
+        from_user = MagicMock()
+        from_user.first_name = 'Jane'
+        from_user.last_name = 'Smith'
+        from_user.username = None
+        message = self._mock_message(from_user=from_user)
+        self.assertEqual(self.parser._get_author_info(message), 'Jane Smith')
+
+    def test_from_user_only_first_name(self):
+        from_user = MagicMock()
+        from_user.first_name = 'Alice'
+        from_user.last_name = None
+        from_user.username = None
+        message = self._mock_message(from_user=from_user)
+        self.assertEqual(self.parser._get_author_info(message), 'Alice')
+
+    def test_from_user_only_last_name(self):
+        from_user = MagicMock()
+        from_user.first_name = None
+        from_user.last_name = 'Brown'
+        from_user.username = None
+        message = self._mock_message(from_user=from_user)
+        self.assertEqual(self.parser._get_author_info(message), 'Brown')
+
+    def test_from_user_empty_names(self):
+        from_user = MagicMock()
+        from_user.first_name = None
+        from_user.last_name = None
+        from_user.username = None
+        message = self._mock_message(from_user=from_user)
+        self.assertEqual(self.parser._get_author_info(message), 'Unknown author')
+
+    def test_no_sender_chat_no_from_user(self):
+        message = self._mock_message(sender_chat=None, from_user=None)
+        self.assertEqual(self.parser._get_author_info(message), 'Unknown author')
+
+if __name__ == '__main__':
+    unittest.main() 
\ No newline at end of file