Add boilerplate for Reach SMS callbacks

This is enough to update a notification in DB:

1. First create a notification in the UI and sent it.

2. Then reset its attributes to pretend it's for Reach.

    update notifications set
      sent_at = null,
      sent_by = null,
      notification_status='sending'
    where id='some-uuid';

3. Change "notification_id" to "<some-uuid>" in the code.

4. Call the boilerplate endpoint for Reach callbacks.

    curl -X POST localhost:6011/notifications/sms/reach

Interestingly there's no foreign key constraint on "sent_by" in the
DB, so this just works: the notification is updated.

tests/app/celery/test_process_sms_client_response_tasks.py

@@ -18,7 +18,7 @@ def test_process_sms_client_response_raises_error_if_reference_is_not_a_valid_uu
             status='000', provider_reference='something-bad', client_name='sms-client')
 
 
-@pytest.mark.parametrize('client_name', ('Firetext', 'MMG'))
+@pytest.mark.parametrize('client_name', ('Firetext', 'MMG', 'Reach'))
 def test_process_sms_response_raises_client_exception_for_unknown_status(
     sample_notification,
     mocker,
@@ -43,6 +43,9 @@ def test_process_sms_response_raises_client_exception_for_unknown_status(
     ('3', '2', 'MMG', 'delivered', "Delivered to operator"),
     ('4', '27', 'MMG', 'temporary-failure', "Absent Subscriber"),
     ('5', '13', 'MMG', 'permanent-failure', "Sender id blacklisted"),
+    ('TODO-d', None, 'Reach', 'delivered', "TODO: Delivered"),
+    ('TODO-tf', None, 'Reach', 'temporary-failure', "TODO: Temporary failure"),
+    ('TODO-pf', None, 'Reach', 'permanent-failure', "TODO: Permanent failure"),
 ])
 def test_process_sms_client_response_updates_notification_status(
     sample_notification,

tests/app/clients/test_reach.py

@@ -0,0 +1 @@
+# TODO: all of the tests

tests/app/notifications/test_notifications_sms_callbacks.py

@@ -17,6 +17,13 @@ def mmg_post(client, data):
         headers=[('Content-Type', 'application/json')])
 
 
+def reach_post(client, data):
+    return client.post(
+        path='/notifications/sms/reach',
+        data=data,
+        headers=[('Content-Type', 'application/json')])
+
+
 def test_firetext_callback_should_not_need_auth(client, mocker):
     mocker.patch('app.notifications.notifications_sms_callback.process_sms_client_response')
     data = 'mobile=441234123123&status=0&reference=notification_id&time=2016-03-10 14:17:00'
@@ -135,6 +142,24 @@ def test_mmg_callback_should_return_200_and_call_task_with_valid_data(client, mo
     )
 
 
+# TODO: more tests about edge cases for this provider
+def test_reach_callback_should_return_200_and_call_task_with_valid_data(client, mocker):
+    mock_celery = mocker.patch(
+        'app.notifications.notifications_sms_callback.process_sms_client_response.apply_async')
+    data = json.dumps({"data": "TODO"})
+
+    response = reach_post(client, data)
+
+    assert response.status_code == 200
+    json_data = json.loads(response.data)
+    assert json_data['result'] == 'success'
+
+    mock_celery.assert_called_once_with(
+        ['TODO-d', 'notification_id', 'Reach', 'something'],
+        queue='sms-callbacks',
+    )
+
+
 def test_validate_callback_data_returns_none_when_valid():
     form = {'status': 'good',
             'reference': 'send-sms-code'}