### Question:
XlsxExportContactsFileCreatorService { public Workbook createFileForOkrTeam(long departmentId) throws IllegalAccessException { Collection<TeamMemberRow> teamMemberRows = teamMemberRowBuilderService.generateForOkrChildUnit(departmentId); Workbook workbook = genericXlsxFileCreatorService.createWorkbook(teamMemberRows, headlines, "okr-members"); logger.info( "Created excel file with member information about okr team with ID: " + departmentId); return workbook; } XlsxExportContactsFileCreatorService(
      TeamMemberRowBuilderService teamMemberRowBuilderService,
      GenericXlsxFileCreatorService<TeamMemberRow> genericXlsxFileCreatorService,
      Messages messages); Workbook createFileForOkrTeam(long departmentId); Workbook createFileForCompany(long companyId);  }### Answer:
@Test public void createFileForOkrTeam_shouldReturnWorkbookWhichIsReturnedByGenericFileCreatorService() throws IllegalAccessException { Workbook workbook = xlsxExportContactsFileCreatorService.createFileForOkrTeam(departmentId); Assert.assertEquals(this.workbook, workbook); verify(teamMemberRowBuilderService, times(1)).generateForOkrChildUnit(departmentId); }