Apply automatic linting fixes to tests directory

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/utilities/test_file_handler.py

@@ -7,16 +7,16 @@ from crewai.utilities.file_handler import PickleHandler
 
 
 class TestPickleHandler(unittest.TestCase):
-    def setUp(self):
+    def setUp(self) -> None:
         self.file_name = "test_data.pkl"
         self.file_path = os.path.join(os.getcwd(), self.file_name)
         self.handler = PickleHandler(self.file_name)
 
-    def tearDown(self):
+    def tearDown(self) -> None:
         if os.path.exists(self.file_path):
             os.remove(self.file_path)
 
-    def test_initialize_file(self):
+    def test_initialize_file(self) -> None:
         assert os.path.exists(self.file_path) is False
 
         self.handler.initialize_file()
@@ -24,17 +24,17 @@ class TestPickleHandler(unittest.TestCase):
         assert os.path.exists(self.file_path) is True
         assert os.path.getsize(self.file_path) >= 0
 
-    def test_save_and_load(self):
+    def test_save_and_load(self) -> None:
         data = {"key": "value"}
         self.handler.save(data)
         loaded_data = self.handler.load()
         assert loaded_data == data
 
-    def test_load_empty_file(self):
+    def test_load_empty_file(self) -> None:
         loaded_data = self.handler.load()
         assert loaded_data == {}
 
-    def test_load_corrupted_file(self):
+    def test_load_corrupted_file(self) -> None:
         with open(self.file_path, "wb") as file:
             file.write(b"corrupted data")
 
@@ -42,4 +42,4 @@ class TestPickleHandler(unittest.TestCase):
             self.handler.load()
 
         assert str(exc.value) == "pickle data was truncated"
-        assert "<class '_pickle.UnpicklingError'>" == str(exc.type)
+        assert str(exc.type) == "<class '_pickle.UnpicklingError'>"