### Question:
AdminUserService { public void removeAdmin(UUID adminToRemove) { adminUserRepository.deleteById(adminToRemove); } @Autowired  AdminUserService(AdminUserRepository adminUserRepository, UserService userService); Boolean isCurrentUserAdmin(); Collection<UUID> getAllAdmins(); User addAdmin(AdminUser newAdminUser); void removeAdmin(UUID adminToRemove);  }### Answer:
@Test public void removeAdmin_expectedRemoveCall() { UUID userId = UUID.randomUUID(); adminUserService.removeAdmin(userId); verify(adminUserRepository).deleteById(userId); }