Add NotificationSender, one test

tests/utils/test_notification_sender.py

@@ -0,0 +1,27 @@
+import pytest
+from unittest.mock import Mock
+
+from tests.factories import NotificationRecipientFactory
+from atst.utils.notification_sender import NotificationSender
+
+
+@pytest.fixture
+def mock_queue(queue):
+    return Mock(spec=queue)
+
+
+@pytest.fixture
+def notification_sender(mock_queue):
+    return NotificationSender(mock_queue)
+
+
+def test_can_send_notification(mock_queue, notification_sender):
+    recipient_email = "test@example.com"
+    email_body = "This is a test"
+
+    NotificationRecipientFactory.create(email=recipient_email)
+    notification_sender.send(email_body)
+
+    mock_queue.send_mail.assert_called_once_with(
+        ["test@example.com"], notification_sender.EMAIL_SUBJECT, email_body
+    )