@Test
public void getSumByPaymentMethodNormal() {

    entries = new ArrayList<>();
    entries.add(new LabeledGraphEntry(15, LABEL_1));
    entries.add(new LabeledGraphEntry(3, LABEL_2));
    entries.add(new LabeledGraphEntry(5, LABEL_3));
    when(groupingController.getSummationByPaymentMethodAsGraphEntries(trip)).thenReturn(Single.just(entries));
    List<LabeledGraphEntry> sortedEntries = new ArrayList<>(entries);
    Collections.sort(sortedEntries);
    interactor.getSummationByPaymentMethod(trip)
            .test()
            .assertNoErrors()
            .assertComplete()
            .assertValues(GraphUiIndicator.summationByPaymentMethod(sortedEntries));
}