Added tests for api

Author: sergioteula

pyproject.toml

@@ -13,6 +13,7 @@ skip_glob = "*/sdk/*"
     [tool.pylint.message_control]
         disable = [
             "no-self-use",
+            "protected-access",
             "too-many-arguments",
             "too-many-instance-attributes",
             "too-many-locals",

tests/test_api.py

@@ -1,20 +1,42 @@
+import time
 import unittest
 from unittest import mock
 
 from amazon_paapi import AmazonApi, models
+from amazon_paapi.errors.exceptions import InvalidArgument
 from amazon_paapi.helpers import requests
 
 
-class TestGetItems(unittest.TestCase):
+class TestApi(unittest.TestCase):
+    def test_api_init_invalid_argument(self):
+        with self.assertRaises(InvalidArgument):
+            AmazonApi("key", "secret", "tag", "invalid_country")
+
+    def test_api_throttling_disabled(self):
+        throttling = 0
+        amazon = AmazonApi("key", "secret", "tag", "ES", throttling)
+        start = int(time.time())
+        amazon._throttle()
+        amazon._throttle()
+
+        self.assertEqual(start, int(time.time()))
+
+    def test_api_throttling_sleeps(self):
+        throttling = 1
+        amazon = AmazonApi("key", "secret", "tag", "ES", throttling)
+        start = int(time.time())
+        amazon._throttle()
+        amazon._throttle()
+
+        self.assertTrue(start < int(time.time()))
+
     @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))
 
-
-class TestSearchItems(unittest.TestCase):
     @mock.patch.object(requests, "get_search_items_response")
     def test_search_items(self, mocked_get_search_items_response):
         mocked_response = models.SearchResult()
@@ -24,8 +46,6 @@ def test_search_items(self, mocked_get_search_items_response):
         response = amazon.search_items(keywords="test")
         self.assertTrue(isinstance(response.items, list))
 
-
-class TestGetVariations(unittest.TestCase):
     @mock.patch.object(requests, "get_variations_response")
     def test_get_variations(self, mocked_get_variations_response):
         mocked_response = models.VariationsResult()
@@ -35,10 +55,8 @@ def test_get_variations(self, mocked_get_variations_response):
         response = amazon.get_variations("ABCDEFGHIJ")
         self.assertTrue(isinstance(response.items, list))
 
-
-class TestGetBrowseNodes(unittest.TestCase):
     @mock.patch.object(requests, "get_browse_nodes_response")
-    def test_search_items(self, mocked_get_browse_nodes_response):
+    def test_get_browse_nodes(self, mocked_get_browse_nodes_response):
         mocked_response = []
         mocked_get_browse_nodes_response.return_value = mocked_response
         amazon = AmazonApi("key", "secret", "tag", "ES")