@Test
public void testGetNodesNoQuery() {

    Page<Node> resultPage = graphController.getNodes(null, PageRequest.of(0, 30));
    assertThat(resultPage, notNullValue());
    assertThat(resultPage.getTotalElements(), is(5L));
    assertThat(resultPage.getTotalPages(), is(1));
    List<Node> nodes = resultPage.getContent();
    assertThat(nodes, hasSize(5));
}