Added a test that the message is not sent if the status of the notification is not created.

tests/app/celery/test_provider_tasks.py

@@ -4,6 +4,7 @@ from celery.exceptions import MaxRetriesExceededError
 from mock import ANY, call
 from notifications_utils.recipients import validate_phone_number, format_phone_number
 
+import app
 from app import statsd_client, mmg_client
 from app.celery import provider_tasks
 from app.celery.provider_tasks import send_sms_to_provider
@@ -219,6 +220,26 @@ def test_not_should_update_provider_stats_on_success_in_research_mode(notify_db,
     assert len(updated_provider_stats) == 0
 
 
+def test_should_not_send_to_provider_when_status_is_not_created(notify_db, notify_db_session,
+                                                                sample_service,
+                                                                mocker):
+    notification = sample_notification(notify_db=notify_db, notify_db_session=notify_db_session,
+                        service=sample_service,
+                        status='sending')
+    mocker.patch('app.mmg_client.send_sms')
+    mocker.patch('app.mmg_client.get_name', return_value="mmg")
+    mocker.patch('app.celery.research_mode_tasks.send_sms_response.apply_async')
+
+    send_sms_to_provider(
+        notification.service_id,
+        notification.id
+    )
+
+    app.mmg_client.send_sms.assert_not_called()
+    app.celery.research_mode_tasks.send_sms_response.apply_async.assert_not_called()
+
+
+
 def test_statsd_updates(notify_db, notify_db_session, sample_service, sample_notification, mocker):
     mocker.patch('app.statsd_client.incr')
     mocker.patch('app.statsd_client.timing')