Add new methods to Service and Complaint api clients

* Added a new method to the ComplaintApiClient to get the total
complaints by date range from the API.
* Added a new method to the ServiceAPIClient to get the new platform
admin stats data from the API.

tests/app/notify_client/test_compliant_client.py

@@ -8,3 +8,12 @@ def test_get_all_complaints(mocker):
 
     client.get_all_complaints()
     mock.assert_called_once_with('/complaint')
+
+
+def test_get_complaint_count(mocker):
+    client = ComplaintApiClient()
+    mock = mocker.patch.object(client, 'get')
+    params_dict = {'start_date': '2018-06-01', 'end_date': '2018-06-15'}
+
+    client.get_complaint_count(params_dict=params_dict)
+    mock.assert_called_once_with('/complaint/count-by-date-range', params=params_dict)

tests/app/notify_client/test_service_api_client.py

@@ -53,6 +53,15 @@ def test_client_only_updates_allowed_attributes(mocker):
     assert str(error.value) == 'Not allowed to update service attributes: foo'
 
 
+def test_get_new_aggregate_platform_stats(mocker):
+    client = ServiceAPIClient()
+    mock = mocker.patch.object(client, 'get')
+    params_dict = {'start_date': '2018-06-01', 'end_date': '2018-06-15'}
+
+    client.get_new_aggregate_platform_stats(params_dict=params_dict)
+    mock.assert_called_once_with('/service/platform-stats-new', params=params_dict)
+
+
 def test_client_creates_service_with_correct_data(
     mocker,
     active_user_with_permissions,