make sure redis command filters dates properly

also write the tests that i should have written a while ago for this

tests/app/commands/test_performance_platform_commands.py

@@ -0,0 +1,29 @@
+from datetime import datetime
+
+from app.commands import backfill_performance_platform_totals, backfill_processing_time
+
+
+def test_backfill_processing_time_works_for_correct_dates(mocker, notify_api):
+    send_mock = mocker.patch('app.commands.send_processing_time_for_start_and_end')
+
+    # 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_processing_time.callback.__wrapped__(datetime(2017, 8, 1), datetime(2017, 8, 3))
+
+    assert send_mock.call_count == 3
+    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))