test: convert unittest-style tests to pytest in test_utils.py and test_notifications.py

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

tests/test_utils.py

@@ -1,35 +1,39 @@
 import os
 import tempfile
-import unittest
+
+import pytest
+
 from app.utils import hash_file
 
-class TestUtils(unittest.TestCase):
+
+@pytest.mark.unit
+class TestUtils:
     def test_hash_file_empty(self):
         """Test hashing an empty file"""
         with tempfile.NamedTemporaryFile(delete=False) as tmp_file:
             pass
-        
+
         try:
             # Known SHA-256 hash of an empty file
             expected_hash = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
-            self.assertEqual(hash_file(tmp_file.name), expected_hash)
+            assert hash_file(tmp_file.name) == expected_hash
         finally:
             os.unlink(tmp_file.name)
-    
+
     def test_hash_file_with_content(self):
         """Test hashing a file with known content"""
         content = b"Hello, World!"
         with tempfile.NamedTemporaryFile(delete=False) as tmp_file:
             tmp_file.write(content)
             tmp_file.flush()
-        
+
         try:
             # Known SHA-256 hash of "Hello, World!"
             expected_hash = "dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f"
-            self.assertEqual(hash_file(tmp_file.name), expected_hash)
+            assert hash_file(tmp_file.name) == expected_hash
         finally:
             os.unlink(tmp_file.name)
-    
+
     def test_hash_file_large_content(self):
         """Test hashing a file larger than the chunk size"""
         # Create content larger than the default chunk size (65536)
@@ -37,13 +41,10 @@ class TestUtils(unittest.TestCase):
         with tempfile.NamedTemporaryFile(delete=False) as tmp_file:
             tmp_file.write(content)
             tmp_file.flush()
-        
+
         try:
             # Test that we can hash a large file
             hash_result = hash_file(tmp_file.name)
-            self.assertEqual(len(hash_result), 64)  # SHA-256 hashes are 64 characters long
+            assert len(hash_result) == 64  # SHA-256 hashes are 64 characters long
         finally:
             os.unlink(tmp_file.name)
-
-if __name__ == '__main__':
-    unittest.main()