Add an endpoint to return all the data required for the performance

platform page.

tests/app/dao/test_fact_processing_time_dao.py

@@ -1,8 +1,10 @@
 from datetime import datetime
+from decimal import Decimal
 
 from freezegun import freeze_time
 
 from app.dao import fact_processing_time_dao
+from app.dao.fact_processing_time_dao import get_processing_time_percentage_for_date_range
 from app.models import FactProcessingTime
 
 
@@ -40,3 +42,21 @@ def test_insert_update_processing_time(notify_db_session):
     assert result[0].messages_within_10_secs == 3
     assert result[0].created_at
     assert result[0].updated_at == datetime(2021, 2, 23, 13, 23, 33)
+
+
+def test_get_processing_time_percentage_for_date_range(notify_db_session):
+    data = FactProcessingTime(
+        bst_date=datetime(2021, 2, 22).date(),
+        messages_total=3,
+        messages_within_10_secs=2
+    )
+
+    fact_processing_time_dao.insert_update_processing_time(data)
+
+    results = get_processing_time_percentage_for_date_range('2021-02-22', '2021-02-22')
+
+    assert len(results) == 1
+    assert results[0].date == '2021-02-22'
+    assert results[0].messages_total == 3
+    assert results[0].messages_within_10_secs == 2
+    assert round(results[0].percentage, 1) == 66.7