add statuses filter to GET /service/{}/job

can now pass in a query string `?statuses=x,y,z` to filter jobs based on
`Job.job_status`. Not passing in a status or passing in an empty string is
equivalent to selecting every filter type at once.

tests/app/job/test_rest.py

@@ -14,7 +14,7 @@ from tests.app.conftest import (
     sample_notification as create_notification
 )
 from app.dao.templates_dao import dao_update_template
-from app.models import NOTIFICATION_STATUS_TYPES
+from app.models import NOTIFICATION_STATUS_TYPES, JOB_STATUS_TYPES, JOB_STATUS_PENDING
 
 
 def test_get_job_with_invalid_service_id_returns404(notify_api, sample_api_key, sample_service):
@@ -655,6 +655,42 @@ def test_get_jobs_accepts_page_parameter(
     assert set(resp_json['links'].keys()) == {'prev', 'next', 'last'}
 
 
+@pytest.mark.parametrize('statuses_filter, expected_statuses', [
+    ('', JOB_STATUS_TYPES),
+    ('pending', [JOB_STATUS_PENDING]),
+    ('pending, in progress, finished, sending limits exceeded, scheduled, cancelled', JOB_STATUS_TYPES),
+    # bad statuses are accepted, just return no data
+    ('foo', [])
+])
+def test_get_jobs_can_filter_on_statuses(
+        notify_db,
+        notify_db_session,
+        client,
+        sample_service,
+        statuses_filter,
+        expected_statuses
+):
+    create_job(notify_db, notify_db_session, job_status='pending')
+    create_job(notify_db, notify_db_session, job_status='in progress')
+    create_job(notify_db, notify_db_session, job_status='finished')
+    create_job(notify_db, notify_db_session, job_status='sending limits exceeded')
+    create_job(notify_db, notify_db_session, job_status='scheduled')
+    create_job(notify_db, notify_db_session, job_status='cancelled')
+
+    path = '/service/{}/job'.format(sample_service.id)
+    response = client.get(
+        path,
+        headers=[create_authorization_header()],
+        query_string={'statuses': statuses_filter}
+    )
+
+    assert response.status_code == 200
+    resp_json = json.loads(response.get_data(as_text=True))
+    from pprint import pprint
+    pprint(resp_json)
+    assert {x['job_status'] for x in resp_json['data']} == set(expected_statuses)
+
+
 def create_10_jobs(db, session, service, template):
     with freeze_time('2015-01-01T00:00:00') as the_time:
         for _ in range(10):