adding testing framework

tests/tst_app.py

@@ -0,0 +1,37 @@
+import unittest
+from unittest.mock import patch, MagicMock
+from typing import List
+from dotlas import App
+
+class TestApp(unittest.TestCase):  # Replace App with the actual class name
+
+    @classmethod
+    def setUpClass(cls):
+        cls.app = App("xyz")  # Replace App with the actual class name
+
+    @patch.object(App, "_App__generic_fetch")  # Replace App with the actual class name
+    def test_list_commercial_types(self, mock_fetch):
+        mock_fetch.return_value = ['retail', 'restaurants', 'gyms']
+        result = self.app.list_commercial_types()
+        self.assertEqual(result, ['retail', 'restaurants', 'gyms'])
+
+    @patch.object(App, "_App__generic_fetch")  # Replace App with the actual class name
+    def test_list_cities(self, mock_fetch):
+        mock_fetch.return_value = ['Los Angeles', 'New York', 'Chicago']
+        result = self.app.list_cities()
+        self.assertEqual(result, ['Los Angeles', 'New York', 'Chicago'])
+
+    @patch.object(App, "_App__generic_fetch")  # Replace App with the actual class name
+    def test_list_places_in_city(self, mock_fetch):
+        mock_fetch.return_value = ['Burbank', 'Beverly Hills']
+        result = self.app.list_places_in_city('Los Angeles')
+        self.assertEqual(result, ['Burbank', 'Beverly Hills'])
+
+    @patch.object(App, "_App__generic_fetch")  # Replace App with the actual class name
+    def test_list_areas_in_city(self, mock_fetch):
+        mock_fetch.return_value = ['Financial District', 'Upper West Side']
+        result = self.app.list_areas_in_city('New York')
+        self.assertEqual(result, ['Financial District', 'Upper West Side'])
+
+if __name__ == '__main__':
+    unittest.main()