don't hit the query to get daily msg stats if redis is disabled

tests/app/notifications/test_validators.py

@@ -1,6 +1,7 @@
 import pytest
 from freezegun import freeze_time
 from flask import current_app
+
 import app
 from app.models import INTERNATIONAL_SMS_TYPE, SMS_TYPE, EMAIL_TYPE
 from app.notifications.validators import (
@@ -18,6 +19,8 @@ from app.v2.errors import (
     BadRequestError,
     TooManyRequestsError,
     RateLimitError)
+
+from tests.conftest import set_config
 from tests.app.conftest import (
     sample_notification as create_notification,
     sample_service as create_service,
@@ -26,6 +29,13 @@ from tests.app.conftest import (
 from tests.app.db import create_reply_to_email, create_service_sms_sender
 
 
+# all of these tests should have redis enabled (except where we specifically disable it)
+@pytest.fixture(scope='module', autouse=True)
+def enable_redis(notify_api):
+    with set_config(notify_api, 'REDIS_ENABLED', True):
+        yield
+
+
 @pytest.mark.parametrize('key_type', ['test', 'team', 'normal'])
 def test_check_service_message_limit_in_cache_with_unrestricted_service_is_allowed(
         key_type,
@@ -78,6 +88,15 @@ def test_should_set_cache_value_as_value_from_database_if_cache_not_set(
         )
 
 
+def test_should_not_access_database_if_redis_disabled(notify_api, sample_service, mocker):
+    with set_config(notify_api, 'REDIS_ENABLED', False):
+        db_mock = mocker.patch('app.notifications.validators.services_dao')
+
+        check_service_over_daily_message_limit('normal', sample_service)
+
+        assert db_mock.method_calls == []
+
+
 @pytest.mark.parametrize('key_type', ['team', 'normal'])
 def test_check_service_message_limit_over_message_limit_fails(key_type, notify_db, notify_db_session, mocker):
     with freeze_time("2016-01-01 12:00:00.000000"):