def METHOD_NAME(dummy_request):
    from encoded.batch_download import is_cart_search
    dummy_request.environ['QUERY_STRING'] = (
        'type=Experiment&limit=all'
    )
    assert not is_cart_search(dummy_request)
    dummy_request.environ['QUERY_STRING'] = (
        'type=Experiment&cart=/carts/abc/&field=@id'
    )
    assert is_cart_search(dummy_request)