use ft_notification_status and notifications for job statistics

we previously always read from NotificationHistory to get the
notification status stats for a job. Now, if the job is more than three
days old read from ft_notification_status table, otherwise read from
the notifications table (to keep live updates).

tests/app/dao/test_fact_notification_status_dao.py

@@ -9,11 +9,12 @@ from app.dao.fact_notification_status_dao import (
     fetch_notification_status_for_service_by_month,
     fetch_notification_status_for_service_for_day,
     fetch_notification_status_for_service_for_today_and_7_previous_days,
-    fetch_notification_status_totals_for_all_services
+    fetch_notification_status_totals_for_all_services,
+    fetch_notification_statuses_for_job,
 )
 from app.models import FactNotificationStatus, KEY_TYPE_TEST, KEY_TYPE_TEAM, EMAIL_TYPE, SMS_TYPE, LETTER_TYPE
 from freezegun import freeze_time
-from tests.app.db import create_notification, create_service, create_template, create_ft_notification_status
+from tests.app.db import create_notification, create_service, create_template, create_ft_notification_status, create_job
 
 
 def test_update_fact_notification_status(notify_db_session):
@@ -288,3 +289,18 @@ def set_up_data():
     create_notification(sms_template, created_at=datetime(2018, 10, 31, 11, 0, 0))
     create_notification(sms_template, created_at=datetime(2018, 10, 31, 12, 0, 0), status='delivered')
     create_notification(email_template, created_at=datetime(2018, 10, 31, 13, 0, 0), status='delivered')
+
+
+def test_fetch_notification_statuses_for_job(sample_template):
+    j1 = create_job(sample_template)
+    j2 = create_job(sample_template)
+
+    create_ft_notification_status(date(2018, 10, 1), job=j1, notification_status='created', count=1)
+    create_ft_notification_status(date(2018, 10, 1), job=j1, notification_status='delivered', count=2)
+    create_ft_notification_status(date(2018, 10, 2), job=j1, notification_status='created', count=4)
+    create_ft_notification_status(date(2018, 10, 1), job=j2, notification_status='created', count=8)
+
+    assert {x.status: x.count for x in fetch_notification_statuses_for_job(j1.id)} == {
+        'created': 5,
+        'delivered': 2
+    }

tests/app/dao/test_jobs_dao.py

@@ -19,13 +19,54 @@ from app.models import (
     Job,
     EMAIL_TYPE, SMS_TYPE, LETTER_TYPE
 )
-from tests.app.db import create_job, create_service, create_template
+from tests.app.db import create_job, create_service, create_template, create_notification
 
 
 def test_should_have_decorated_notifications_dao_functions():
     assert dao_get_notification_outcomes_for_job.__wrapped__.__name__ == 'dao_get_notification_outcomes_for_job'  # noqa
 
 
+def test_should_count_of_statuses_for_notifications_associated_with_job(sample_template, sample_job):
+    create_notification(sample_template, job=sample_job, status='created')
+    create_notification(sample_template, job=sample_job, status='created')
+    create_notification(sample_template, job=sample_job, status='created')
+    create_notification(sample_template, job=sample_job, status='sending')
+    create_notification(sample_template, job=sample_job, status='delivered')
+
+    results = dao_get_notification_outcomes_for_job(sample_template.service_id, sample_job.id)
+    assert {row.status: row.count for row in results} == {
+        'created': 3,
+        'sending': 1,
+        'delivered': 1,
+    }
+
+
+def test_should_return_zero_length_array_if_no_notifications_for_job(sample_service, sample_job):
+    assert len(dao_get_notification_outcomes_for_job(sample_job.id, sample_service.id)) == 0
+
+
+def test_should_return_notifications_only_for_this_job(sample_template):
+    job_1 = create_job(sample_template)
+    job_2 = create_job(sample_template)
+
+    create_notification(sample_template, job=job_1, status='created')
+    create_notification(sample_template, job=job_2, status='sent')
+
+    results = dao_get_notification_outcomes_for_job(sample_template.service_id, job_1.id)
+    assert {row.status: row.count for row in results} == {'created': 1}
+
+
+def test_should_return_notifications_only_for_this_service(sample_notification_with_job):
+    other_service = create_service(service_name='one')
+    other_template = create_template(service=other_service)
+    other_job = create_job(other_template)
+
+    create_notification(other_template, job=other_job)
+
+    assert len(dao_get_notification_outcomes_for_job(sample_notification_with_job.service_id, other_job.id)) == 0
+    assert len(dao_get_notification_outcomes_for_job(other_service.id, sample_notification_with_job.id)) == 0
+
+
 def test_create_sample_job(sample_template):
     assert Job.query.count() == 0