Add command to backfill Performance Platform totals

We don’t have any way of playing back the totals we send to performance
platform.

This commit copies the command used to backfill the processing time and
adapts it to backfill the totals instead. Under the hood it uses the
same code that we use in the scheduled tasks to update performance
platform on a daily basis. I had to modify this code to take a `day`
argument because it was hardcoded to only work for ‘yesterday’.

tests/app/celery/test_scheduled_tasks.py

@@ -335,7 +335,7 @@ def test_send_total_sent_notifications_to_performance_platform_calls_with_correc
         new_callable=PropertyMock
     ) as mock_active:
         mock_active.return_value = True
-        send_total_sent_notifications_to_performance_platform()
+        send_total_sent_notifications_to_performance_platform(yesterday)
 
         perf_mock.assert_has_calls([
             call(get_london_midnight_in_utc(yesterday), 'sms', 2),

tests/app/performance_platform/test_total_sent_notifications.py

@@ -6,7 +6,7 @@ from freezegun import freeze_time
 from app.utils import get_midnight_for_day_before
 from app.performance_platform.total_sent_notifications import (
     send_total_notifications_sent_for_day_stats,
-    get_total_sent_notifications_yesterday
+    get_total_sent_notifications_for_day
 )
 
 from tests.app.conftest import (
@@ -55,6 +55,7 @@ def test_get_total_sent_notifications_yesterday_returns_expected_totals_dict(
 
     # Create some notifications for the day before
     yesterday = datetime(2016, 1, 10, 15, 30, 0, 0)
+    ereyesterday = datetime(2016, 1, 9, 15, 30, 0, 0)
     with freeze_time(yesterday):
         notification_history(notification_type='letter')
         notification_history(notification_type='sms')
@@ -63,7 +64,7 @@ def test_get_total_sent_notifications_yesterday_returns_expected_totals_dict(
         notification_history(notification_type='email')
         notification_history(notification_type='email')
 
-    total_count_dict = get_total_sent_notifications_yesterday()
+    total_count_dict = get_total_sent_notifications_for_day(yesterday)
 
     assert total_count_dict == {
         "start_date": get_midnight_for_day_before(datetime.utcnow()),
@@ -77,3 +78,12 @@ def test_get_total_sent_notifications_yesterday_returns_expected_totals_dict(
             "count": 1
         }
     }
+
+    another_day = get_total_sent_notifications_for_day(ereyesterday)
+
+    assert another_day == {
+        'email': {'count': 0},
+        'letter': {'count': 0},
+        'sms': {'count': 0},
+        'start_date': datetime(2016, 1, 9, 0, 0),
+    }

tests/app/test_commands.py

@@ -1,6 +1,6 @@
 from datetime import datetime
 
-from app.commands import backfill_processing_time
+from app.commands import backfill_performance_platform_totals, backfill_processing_time
 
 
 def test_backfill_processing_time_works_for_correct_dates(mocker, notify_api):
@@ -14,3 +14,16 @@ def test_backfill_processing_time_works_for_correct_dates(mocker, notify_api):
     send_mock.assert_any_call(datetime(2017, 7, 31, 23, 0), datetime(2017, 8, 1, 23, 0))
     send_mock.assert_any_call(datetime(2017, 8, 1, 23, 0), datetime(2017, 8, 2, 23, 0))
     send_mock.assert_any_call(datetime(2017, 8, 2, 23, 0), datetime(2017, 8, 3, 23, 0))
+
+
+def test_backfill_totals_works_for_correct_dates(mocker, notify_api):
+    send_mock = mocker.patch('app.commands.send_total_sent_notifications_to_performance_platform')
+
+    # backfill_processing_time is a click.Command object - if you try invoking the callback on its own, it
+    # throws a `RuntimeError: There is no active click context.` - so get at the original function using __wrapped__
+    backfill_performance_platform_totals.callback.__wrapped__(datetime(2017, 8, 1), datetime(2017, 8, 3))
+
+    assert send_mock.call_count == 3
+    send_mock.assert_any_call(datetime(2017, 8, 1))
+    send_mock.assert_any_call(datetime(2017, 8, 2))
+    send_mock.assert_any_call(datetime(2017, 8, 3))