fix: flake8

Author: Bucknalla

test/fluent_api/test_note.py

@@ -75,7 +75,7 @@
                 'compact': 'format'
             },
             {
-                'format' : 'compact'
+                'format': 'compact'
             }
         ),
         (

test/test_md5.py

@@ -1,6 +1,7 @@
 import unittest
 import sys
 
+
 class TestMD5(unittest.TestCase):
     def setUp(self):
         # Store original implementation name

test/test_validators.py

@@ -0,0 +1,73 @@
+import unittest
+import sys
+from unittest.mock import MagicMock, patch
+from notecard import Notecard
+from notecard.validators import validate_card_object
+
+
+class TestValidators(unittest.TestCase):
+
+    def setUp(self):
+        self.mock_notecard = MagicMock(spec=Notecard)
+        # Store original implementation name
+        self.original_implementation = sys.implementation.name
+        # Clear the module from sys.modules to force reload
+        if 'notecard.validators' in sys.modules:
+            del sys.modules['notecard.validators']
+
+    def tearDown(self):
+        # Restore original implementation
+        sys.implementation.name = self.original_implementation
+        # Clear the module again
+        if 'notecard.validators' in sys.modules:
+            del sys.modules['notecard.validators']
+
+    def test_validate_card_object_with_valid_notecard(self):
+        @validate_card_object
+        def test_func(card):
+            return True
+
+        result = test_func(self.mock_notecard)
+        self.assertTrue(result)
+
+    def test_validate_card_object_with_invalid_notecard(self):
+        @validate_card_object
+        def test_func(card):
+            return True
+
+        with self.assertRaises(Exception) as context:
+            test_func("not a notecard")
+        self.assertEqual(str(context.exception), "Notecard object required")
+
+    @unittest.skipIf(sys.implementation.name != "cpython", "Function metadata only preserved in CPython")
+    def test_validate_card_object_preserves_metadata(self):
+        @validate_card_object
+        def test_func(card):
+            """Test function docstring."""
+            return True
+
+        self.assertEqual(test_func.__name__, "test_func")
+        self.assertEqual(test_func.__doc__, "Test function docstring.")
+
+    def test_validate_card_object_non_cpython(self):
+        sys.implementation.name = 'non-cpython'
+        from notecard.validators import validate_card_object
+
+        @validate_card_object
+        def test_func(card):
+            return True
+
+        result = test_func(self.mock_notecard)
+        self.assertTrue(result)
+
+    def test_validate_card_object_non_cpython_with_invalid_notecard(self):
+        sys.implementation.name = 'non-cpython'
+        from notecard.validators import validate_card_object
+
+        @validate_card_object
+        def test_func(card):
+            return True
+
+        with self.assertRaises(Exception) as context:
+            test_func("not a notecard")
+        self.assertEqual(str(context.exception), "Notecard object required")