test: Added simple mocked test for get_items

Author: sergioteula

tests/test_api_get_items.py

@@ -0,0 +1,14 @@
+import unittest
+from unittest import mock
+
+from amazon_paapi import AmazonApi
+from amazon_paapi.helpers import requests
+
+
+class TestGetItems(unittest.TestCase):
+    @mock.patch.object(requests, "get_items_response")
+    def test_get_items(self, mocked_get_items_response):
+        mocked_get_items_response.return_value = []
+        amazon = AmazonApi("key", "secret", "tag", "ES")
+        response = amazon.get_items("ABCDEFGHIJ")
+        self.assertTrue(isinstance(response, list))