def METHOD_NAME(
    self,
    global_client,
    customer_client,
    customer_client_present,
    proxy_method,
    args,
):
    svc = VitalSourceService(
        enabled=True,
        global_client=global_client,
        customer_client=customer_client if customer_client_present else None,
    )
    result = getattr(svc, proxy_method)(*args)
    proxied_method = getattr(
        customer_client if customer_client_present else global_client, proxy_method
    )
    proxied_method.assert_called_once_with(*args)
    assert result == proxied_method.return_value