Added tests to ensure pick correct provider from the database in the celery tasks.

tests/app/celery/test_tasks.py

@@ -13,12 +13,13 @@ from app.celery.tasks import (
     delete_verify_codes,
     delete_invitations,
     delete_failed_notifications,
-    delete_successful_notifications
+    delete_successful_notifications,
+    provider_to_use
 )
 from app import (aws_ses_client, encryption, DATETIME_FORMAT, mmg_client)
 from app.clients.email.aws_ses import AwsSesClientException
 from app.clients.sms.mmg import MMGClientException
-from app.dao import notifications_dao, jobs_dao
+from app.dao import notifications_dao, jobs_dao, provider_details_dao
 from sqlalchemy.exc import SQLAlchemyError
 from sqlalchemy.orm.exc import NoResultFound
 from app.celery.tasks import s3
@@ -44,6 +45,36 @@ class AnyStringWith(str):
 mmg_error = {'Error': '40', 'Description': 'error'}
 
 
+def test_should_return_highest_priority_active_provider(notify_db, notify_db_session):
+    providers = provider_details_dao.get_provider_details_by_notification_type('sms')
+    first = providers[0]
+    second = providers[1]
+
+    assert provider_to_use('sms', '1234').name == first.identifier
+
+    first.priority = 20
+    second.priority = 10
+
+    provider_details_dao.dao_update_provider_details(first)
+    provider_details_dao.dao_update_provider_details(second)
+
+    assert provider_to_use('sms', '1234').name == second.identifier
+
+    first.priority = 10
+    first.active = False
+    second.priority = 20
+
+    provider_details_dao.dao_update_provider_details(first)
+    provider_details_dao.dao_update_provider_details(second)
+
+    assert provider_to_use('sms', '1234').name == second.identifier
+
+    first.active = True
+    provider_details_dao.dao_update_provider_details(first)
+
+    assert provider_to_use('sms', '1234').name == first.identifier
+
+
 def test_should_call_delete_notifications_more_than_week_in_task(notify_api, mocker):
     mocked = mocker.patch('app.celery.tasks.delete_notifications_created_more_than_a_week_ago')
     delete_successful_notifications()