test: test add_all and check DeprecationWarning

Author: jorwoods

Diff for: test/test_user.py

@@ -3,6 +3,7 @@
 import os
 from pathlib import Path
 import unittest
+from unittest.mock import patch
 
 from defusedxml.ElementTree import fromstring
 import pytest
@@ -403,3 +404,18 @@ def test_bulk_remove(self):
                 with self.subTest(user=user):
                     name, *_ = row.split(",")
                     assert name == f"{user.domain_name}\\{user.name}" if user.domain_name else user.name
+
+    def test_add_all(self) -> None:
+        self.server.version = "2.0"
+        users = [
+            make_user("Alice", "Viewer"),
+            make_user("Bob", "Explorer"),
+            make_user("Charlie", "Creator", "SAML"),
+            make_user("Dave"),
+        ]
+
+        with patch("tableauserverclient.server.endpoint.users_endpoint.Users.add", autospec=True) as mock_add:
+            with pytest.warns(DeprecationWarning):
+                self.server.users.add_all(users)
+
+        assert mock_add.call_count == len(users)