### Question:
LibraryScreen { protected void changeDescription(String description) { projectContext.getActiveOrganizationalUnit().ifPresent(p -> { organizationalUnitService.call((RemoteCallback<OrganizationalUnit>) this::setDescriptionChanged).updateOrganizationalUnit(p.getName(), p.getDefaultGroupId(), null, description); }); } @Inject  LibraryScreen(final View view,
                         final ManagedInstance<DeleteOrganizationalUnitPopUpPresenter> deleteOrganizationalUnitPopUpPresenters,
                         final WorkspaceProjectContext projectContext,
                         final ProjectController projectController,
                         final OrganizationalUnitController organizationalUnitController,
                         final EmptyLibraryScreen emptyLibraryScreen,
                         final PopulatedLibraryScreen populatedLibraryScreen,
                         final OrgUnitsMetricsScreen orgUnitsMetricsScreen,
                         final SettingsScreenPresenter settingsScreenPresenter,
                         final ContributorsListPresenter contributorsListPresenter,
                         final Caller<LibraryService> libraryService,
                         final Caller<OrganizationalUnitService> organizationalUnitService,
                         final LibraryPlaces libraryPlaces,
                         final SpaceContributorsListServiceImpl spaceContributorsListService,
                         final Event<NotificationEvent> notificationEvent,
                         final TranslationService translationService,
                         final Promises promises); @PostConstruct void init(); void trySamples(); void importProject(); void delete(); void showProjects(); void showContributors(); void showMetrics(); void showSettings(); boolean userCanCreateProjects(); boolean userCanUpdateOrganizationalUnit(); boolean userCanDeleteOrganizationalUnit(); void onNewProject(@Observes NewProjectEvent e); void onRepositoryRemovedEvent(@Observes RepositoryRemovedEvent e); void onProjectCountUpdate(@Observes final ProjectCountUpdate projectCountUpdate); void onSpaceContributorsUpdated(@Observes final SpaceContributorsUpdatedEvent spaceContributorsUpdatedEvent); @OnClose void onClose(); @WorkbenchPartTitle String getTitle(); @WorkbenchPartView View getView();  }### Answer:
@Test public void testUpdateSpaceDescription() { final OrganizationalUnit organizationalUnit = mock(OrganizationalUnit.class); when(organizationalUnit.getDescription()).thenReturn("newdescription"); doReturn(organizationalUnit).when(organizationalUnitService).updateOrganizationalUnit(anyString(), anyString(), any(), anyString()); libraryScreen.changeDescription("newdescription"); verify(this.view, times(1)).setDescription("newdescription"); }