@Test(expected = NullPointerException.class)
public void testXmlLoaderLoadUsingNullFileName() throws IOException {

    // WHEN
    final DataSetLoader<Graph<Node, Edge>> loader = LOADER_PROVIDER.xmlLoader();
    // THEN
    assertThat(loader, notNullValue());
    // WHEN
    loader.load(null);
    // THEN
    // NullPointerException is thrown
}