[WIP] Added dao method and rest endpoint for getting template

statistics by service.

Some cosmetic changes to imports.

Added fix for job rest not correctly returning errors.

tests/app/dao/test_notification_dao.py

@@ -28,7 +28,8 @@ from app.dao.notifications_dao import (
     dao_get_notification_statistics_for_service_and_day,
     update_notification_status_by_id,
     update_notification_reference_by_id,
-    update_notification_status_by_reference
+    update_notification_status_by_reference,
+    dao_get_template_statistics_for_service
 )
 
 from tests.app.conftest import sample_job
@@ -886,10 +887,132 @@ def test_successful_notification_inserts_followed_by_failure_does_not_increment_
         db.session.execute('DROP TABLE TEMPLATE_STATISTICS')
         dao_create_notification(failing_notification, sample_template.template_type)
     except Exception as e:
-
         # There should be no additional notification stats or counts
         assert NotificationStatistics.query.count() == 1
         notication_stats = NotificationStatistics.query.filter(
             NotificationStatistics.service_id == sample_template.service.id
         ).first()
         assert notication_stats.sms_requested == 3
+
+
+@freeze_time("2016-03-30")
+def test_get_template_stats_for_service_returns_stats_in_reverse_date_order(sample_template, sample_job):
+
+    template_stats = dao_get_template_statistics_for_service(sample_template.service.id)
+    assert len(template_stats) == 0
+    data = {
+        'to': '+44709123456',
+        'job_id': sample_job.id,
+        'service': sample_template.service,
+        'service_id': sample_template.service.id,
+        'template': sample_template,
+        'template_id': sample_template.id,
+        'created_at': datetime.utcnow()
+    }
+
+    notification = Notification(**data)
+    dao_create_notification(notification, sample_template.template_type)
+
+    # move on one day
+    with freeze_time('2016-03-31'):
+        new_notification = Notification(**data)
+        dao_create_notification(new_notification, sample_template.template_type)
+
+    # move on one more day
+    with freeze_time('2016-04-01'):
+        new_notification = Notification(**data)
+        dao_create_notification(new_notification, sample_template.template_type)
+
+    template_stats = dao_get_template_statistics_for_service(sample_template.service_id)
+    assert len(template_stats) == 3
+    assert template_stats[0].day == date(2016, 4, 1)
+    assert template_stats[1].day == date(2016, 3, 31)
+    assert template_stats[2].day == date(2016, 3, 30)
+
+
+@freeze_time('2016-04-09')
+def test_get_template_stats_for_service_returns_stats_can_limit_number_of_days_returned(sample_template):
+
+    template_stats = dao_get_template_statistics_for_service(sample_template.service.id)
+    assert len(template_stats) == 0
+
+    # make 9 stats records from 1st to 9th April
+    for i in range(1, 10):
+        past_date = '2016-04-0{}'.format(i)
+        with freeze_time(past_date):
+            template_stats = TemplateStatistics(template_id=sample_template.id,
+                                                service_id=sample_template.service_id)
+            db.session.add(template_stats)
+            db.session.commit()
+
+    # Retrieve last week of stats
+    template_stats = dao_get_template_statistics_for_service(sample_template.service_id, limit_days=7)
+    assert len(template_stats) == 7
+    assert template_stats[0].day == date(2016, 4, 9)
+    assert template_stats[6].day == date(2016, 4, 3)
+
+
+@freeze_time('2016-04-09')
+def test_get_template_stats_for_service_returns_stats_returns_all_stats_if_no_limit(sample_template):
+
+    template_stats = dao_get_template_statistics_for_service(sample_template.service.id)
+    assert len(template_stats) == 0
+
+    # make 9 stats records from 1st to 9th April
+    for i in range(1, 10):
+        past_date = '2016-04-0{}'.format(i)
+        with freeze_time(past_date):
+            template_stats = TemplateStatistics(template_id=sample_template.id,
+                                                service_id=sample_template.service_id)
+            db.session.add(template_stats)
+            db.session.commit()
+
+    template_stats = dao_get_template_statistics_for_service(sample_template.service_id)
+    assert len(template_stats) == 9
+    assert template_stats[0].day == date(2016, 4, 9)
+    assert template_stats[8].day == date(2016, 4, 1)
+
+
+@freeze_time('2016-04-30')
+def test_get_template_stats_for_service_returns_results_from_first_day_with_data(sample_template):
+
+    template_stats = dao_get_template_statistics_for_service(sample_template.service.id)
+    assert len(template_stats) == 0
+
+    # make 9 stats records from 1st to 9th April - no data after 10th
+    for i in range(1, 10):
+        past_date = '2016-04-0{}'.format(i)
+        with freeze_time(past_date):
+            template_stats = TemplateStatistics(template_id=sample_template.id,
+                                                service_id=sample_template.service_id)
+            db.session.add(template_stats)
+            db.session.commit()
+
+    # Retrieve one day of stats - read date is 2016-04-30
+    template_stats = dao_get_template_statistics_for_service(sample_template.service_id, limit_days=1)
+    assert len(template_stats) == 1
+    assert template_stats[0].day == date(2016, 4, 9)
+
+    # Retrieve three days of stats
+    template_stats = dao_get_template_statistics_for_service(sample_template.service_id, limit_days=3)
+    assert len(template_stats) == 3
+    assert template_stats[0].day == date(2016, 4, 9)
+    assert template_stats[1].day == date(2016, 4, 8)
+    assert template_stats[2].day == date(2016, 4, 7)
+
+    # Retrieve nine days of stats
+    template_stats = dao_get_template_statistics_for_service(sample_template.service_id, limit_days=9)
+    assert len(template_stats) == 9
+    assert template_stats[0].day == date(2016, 4, 9)
+    assert template_stats[8].day == date(2016, 4, 1)
+
+    # Retrieve with no limit
+    template_stats = dao_get_template_statistics_for_service(sample_template.service_id)
+    assert len(template_stats) == 9
+    assert template_stats[0].day == date(2016, 4, 9)
+    assert template_stats[8].day == date(2016, 4, 1)
+
+
+def test_get_template_stats_for_service_with_limit_if_no_records_returns_empty_list(sample_template):
+    template_stats = dao_get_template_statistics_for_service(sample_template.service.id, limit_days=7)
+    assert len(template_stats) == 0