@Test
public void testListAllShouldNotListWhenNameAndFolderPathPointsToAnEmptyFolder() throws Exception {

    init();
    // then : path where there is no preparation
    assertThat(preparationService
            .listAll("dont_exist", "wrong_folder_path", null, null, null) //
            .collect(Collectors.toList())
            .size(), is(0));
}