make test folder structure align with app folder structure

tests/app/notify_client/test_statistics_client.py

@@ -0,0 +1,48 @@
+import uuid
+from datetime import datetime
+
+from app.notify_client.statistics_api_client import StatisticsApiClient
+
+
+def test_notifications_statistics_client_calls_correct_api_endpoint(mocker, api_user_active):
+
+    some_service_id = uuid.uuid4()
+    expected_url = '/service/{}/notifications-statistics'.format(some_service_id)
+
+    client = StatisticsApiClient()
+
+    mock_get = mocker.patch('app.notify_client.statistics_api_client.StatisticsApiClient.get')
+
+    client.get_statistics_for_service(some_service_id)
+
+    mock_get.assert_called_once_with(url=expected_url, params={})
+
+
+def test_notifications_statistics_client_calls_correct_api_endpoint_with_params(mocker, api_user_active):
+
+    some_service_id = uuid.uuid4()
+    expected_url = '/service/{}/notifications-statistics'.format(some_service_id)
+
+    client = StatisticsApiClient()
+
+    mock_get = mocker.patch('app.notify_client.statistics_api_client.StatisticsApiClient.get')
+
+    client.get_statistics_for_service(some_service_id, limit_days=99)
+
+    mock_get.assert_called_once_with(url=expected_url, params={'limit_days': 99})
+
+
+def test_notifications_statistics_client_for_stats_by_day_calls_correct_api_endpoint(mocker, api_user_active):
+
+    some_service_id = uuid.uuid4()
+    today = datetime.today().date().strftime('%Y-%m-%d')
+
+    expected_url = '/service/{}/notifications-statistics/day/{}'.format(some_service_id, today)
+
+    client = StatisticsApiClient()
+
+    mock_get = mocker.patch('app.notify_client.statistics_api_client.StatisticsApiClient.get')
+
+    client.get_statistics_for_service_for_day(some_service_id, today)
+
+    mock_get.assert_called_once_with(url=expected_url)