Added some more tests

tests/app/dao/test_service_email_reply_to_dao.py

@@ -1,7 +1,10 @@
+import pytest
+
 from app.dao.service_email_reply_to_dao import (
     create_or_update_email_reply_to,
     dao_get_reply_to_by_service_id
 )
+from app.errors import InvalidRequest
 from app.models import ServiceEmailReplyTo
 from tests.app.db import create_reply_to_email, create_service
 
@@ -40,3 +43,25 @@ def test_create_or_update_email_reply_to_creates_new_entry(notify_db_session):
     assert ServiceEmailReplyTo.query.count() == 1
     assert reply_to[0].service.id == service.id
     assert reply_to[0].email_address == 'test@mail.com'
+
+
+def test_create_or_update_email_reply_to_raises_exception_if_multilple_email_addresses_exist(notify_db_session):
+    service = create_service()
+    create_reply_to_email(service=service, email_address='something@email.com')
+    create_reply_to_email(service=service, email_address='another@email.com', is_default=False)
+
+    with pytest.raises(expected_exception=InvalidRequest) as e:
+        create_or_update_email_reply_to(service_id=service.id, email_address='third@email.com')
+    assert e.value.message == "Multiple reply to email addresses were found, this method should not be used."
+
+
+def test_dao_get_reply_to_by_service_id(notify_db_session):
+    service = create_service()
+    default_reply_to = create_reply_to_email(service=service, email_address='something@email.com')
+    another_reply_to = create_reply_to_email(service=service, email_address='another@email.com', is_default=False)
+
+    results = dao_get_reply_to_by_service_id(service_id=service.id)
+
+    assert len(results) == 2
+    assert default_reply_to in results
+    assert another_reply_to in results