Add tests for existing status api client

Essentially copies the tests found in the performance_platform
api client.

tests/app/notify_client/test_status_api_client.py

@@ -0,0 +1,59 @@
+from app.notify_client.status_api_client import StatusApiClient
+
+
+def test_get_count_of_live_services_and_organisations(mocker):
+    mocker.patch('app.extensions.RedisClient.get', return_value=None)
+    client = StatusApiClient()
+    mock = mocker.patch.object(client, 'get', return_value={})
+
+    client.get_count_of_live_services_and_organisations()
+
+    mock.assert_called_once_with(url='/_status/live-service-and-organisation-counts')
+
+
+def test_sets_value_in_cache(mocker):
+    client = StatusApiClient()
+
+    mock_redis_get = mocker.patch(
+        'app.extensions.RedisClient.get',
+        return_value=None
+    )
+    mock_api_get = mocker.patch(
+        'app.notify_client.NotifyAdminAPIClient.get',
+        return_value={'data_from': 'api'},
+    )
+    mock_redis_set = mocker.patch(
+        'app.extensions.RedisClient.set',
+    )
+
+    assert client.get_count_of_live_services_and_organisations() == {'data_from': 'api'}
+
+    mock_redis_get.assert_called_once_with('live-service-and-organisation-counts')
+    mock_api_get.assert_called_once_with(url='/_status/live-service-and-organisation-counts')
+    mock_redis_set.assert_called_once_with(
+        'live-service-and-organisation-counts',
+        '{"data_from": "api"}',
+        ex=604800
+    )
+
+
+def test_returns_value_from_cache(mocker):
+    client = StatusApiClient()
+
+    mock_redis_get = mocker.patch(
+        'app.extensions.RedisClient.get',
+        return_value=b'{"data_from": "cache"}',
+    )
+    mock_api_get = mocker.patch(
+        'app.notify_client.NotifyAdminAPIClient.get',
+    )
+    mock_redis_set = mocker.patch(
+        'app.extensions.RedisClient.set',
+    )
+
+    assert client.get_count_of_live_services_and_organisations() == {'data_from': 'cache'}
+
+    mock_redis_get.assert_called_once_with('live-service-and-organisation-counts')
+
+    assert mock_api_get.called is False
+    assert mock_redis_set.called is False