Add ticket list test in db layer

Change-Id: Id86c14101180c615ec1a3f24c1b46204793dd1e4

evoque/tests/unit/db/test_ticket.py

@@ -24,3 +24,7 @@ class DBTicketTestCase(base.DBTestCase):
     def test_ticket_create(self):
         ticket = utils.ticket_create(self.context)
         self.assertEqual(ticket.name, 'test-ticket')
+
+    def test_ticket_list(self):
+        tickets = utils.ticket_list(self.context)
+        self.assertFalse(tickets)

evoque/tests/unit/db/utils.py

@@ -22,3 +22,8 @@ def ticket_create(context):
     values = {"name": "test-ticket"}
     ticket = db_api.ticket_create(context, values)
     return ticket
+
+
+def ticket_list(context):
+    tickets = db_api.ticket_get_all(context)
+    return tickets