@Test public void testInit_null() throws Exception{ // when(ftpClientService.getFtpClient(any())).thenReturn(null); //when(task.getCleanDirs().add(any())).thenReturn(null); FileCleanTask task=new FileCleanTask(); task.getCleanDirs().add(""); List<FileCleanTask>tasks=Arrays.asList(task); if(tasks.isEmpty()) { try { Thread.sleep(60000); } catch (InterruptedException e) { log.error("InterruptedException while sleeping",e); } } // when(ftpManagerClient.getCleanTasks(0)).thenReturn(null); //doNothing().when(task.).add(any()); cleanTaskPollService.init(); }怎么调成tasks.isEmpty为1使得UT

可以通过以下方式将 `tasks.isEmpty()` 的返回值设置为 1：

@Test
public void testInit_null() throws Exception{
    // when(ftpClientService.getFtpClient(any())).thenReturn(null);
    //when(task.getCleanDirs().add(any())).thenReturn(null);
    FileCleanTask task=new FileCleanTask();
    task.getCleanDirs().add("");
    List<FileCleanTask>tasks=Arrays.asList(task);
    if(tasks.size() == 0) // 修改此处的判断条件
    {
        try {
            Thread.sleep(60000);
        } catch (InterruptedException e) {
            log.error("InterruptedException while sleeping",e);
        }
    }
//    when(ftpManagerClient.getCleanTasks(0)).thenReturn(null);
    //doNothing().when(task.).add(any());
    cleanTaskPollService.init();
}

将原来的 `tasks.isEmpty()` 改为 `tasks.size() == 0` 即可。