Add dao to get inbound sms by id

app/dao/inbound_sms_dao.py

@@ -47,3 +47,7 @@ def delete_inbound_sms_created_more_than_a_week_ago():
     ).delete(synchronize_session='fetch')
 
     return deleted
+
+
+def dao_get_inbound_sms_by_id(inbound_id):
+    return InboundSms.query.filter_by(id=inbound_id).one()

tests/app/dao/test_inbound_sms_dao.py

@@ -5,7 +5,8 @@ from freezegun import freeze_time
 from app.dao.inbound_sms_dao import (
     dao_get_inbound_sms_for_service,
     dao_count_inbound_sms_for_service,
-    delete_inbound_sms_created_more_than_a_week_ago
+    delete_inbound_sms_created_more_than_a_week_ago,
+    dao_get_inbound_sms_by_id
 )
 from tests.app.db import create_inbound_sms, create_service
 
@@ -86,3 +87,11 @@ def test_should_not_delete_inbound_sms_before_seven_days(sample_service):
     delete_inbound_sms_created_more_than_a_week_ago()
 
     assert len(InboundSms.query.all()) == 2
+
+
+def test_get_inbound_sms_by_id_returns(sample_service):
+    inbound = create_inbound_sms(sample_service)
+
+    inbound_from_db = dao_get_inbound_sms_by_id(inbound.id)
+
+    assert inbound == inbound_from_db