java - 如何在mockito+Junit测试中捕获或模拟意外异常？

Question

这是主文件中的函数，我需要为其编写测试。

@Override
public void processTask(JobExecutionContext arg0) throws TaskException {

    if (BatchInputChannel.DB.toString().equals(runtimeContext.getProperties().getProperty(BATCH_CHANNEL_TYPE))) {
        return;
    } else if (BatchInputChannel.FILE.toString().equals(runtimeContext.getProperties().getProperty(BATCH_CHANNEL_TYPE))) {
        jobLauncher = (JobLauncher) beanFactory.getBean("jobLauncher");
        Job job = (Job) beanFactory.getBean("micorpFileLoadJob");
        JobParameters jobParameters = new JobParametersBuilder()
                                                                .addLong("time", System.currentTimeMillis())
                                                                .toJobParameters();
        try {
            JobExecution jobExecution = jobLauncher.run(job, jobParameters);
            System.out.println("jobExecution=="+jobExecution);
        } catch (JobExecutionAlreadyRunningException | JobRestartException | JobInstanceAlreadyCompleteException
                | JobParametersInvalidException e) {
            throw new ProcessingException("File Loading Failed" + e.getMessage());
        }
    }
}

这是我尝试创建的测试函数

@Test(expected = JobParametersInvalidException.class)
public void processTaskWithFileInputJobFailed5() throws Exception {
    when(mockruntimeContext.getProperties()).thenReturn(mockProperties);
    when(mockProperties.getProperty(BATCH_CHANNEL_TYPE)).thenReturn("FILE");

    when(mockbeanFactory.getBean("jobLauncher")).thenReturn(mockJobLauncher);
    when(mockbeanFactory.getBean("micorpFileLoadJob")).thenReturn(mockjob);

    mockjobParameters = new JobParametersBuilder().addLong("time", System.currentTimeMillis()).toJobParameters();
    when(mockJobLauncher.run(mockjob, mockjobParameters)).thenReturn(mockJobExecution);
    when(mockJobExecution.getStatus()).thenReturn(BatchStatus.FAILED);
    when(mockJobExecution.getJobConfigurationName()).thenReturn(null);
    Mockito.doThrow(new JobParametersInvalidException("Invalid")).when(mockJobLauncher).run(mockjob, mockjobParameters);
    inputFileLoaderTaskProcessor.processTask(mockjobExecutionContext);
}

当我将项目作为 J 单元测试执行时，它期望抛出处理异常，但我在预期中提到了“JobParametersInvalidException”。

正如你所看到的，我在这个函数中只添加了一个异常，为了覆盖主函数中的所有异常(catch内部)，需要做什么？

Answer 1

Mockito.doThrow(new JobParametersInvalidException("Invalid")).when(mockJobLauncher).run(mockjob, mockjobParameters);

由于参数不匹配，因此未调用此 doThrow。

代码中，参数设置方式为:

   JobParameters jobParameters = new JobParametersBuilder()
                                            .addLong("time", System.currentTimeMillis())
                                            .toJobParameters();

在单元测试中，匹配的模拟通过以下方式设置:

mockjobParameters = new JobParametersBuilder().addLong("time", System.currentTimeMillis()).toJobParameters();

问题是，在设置测试和执行测试代码之间，毫秒时钟几乎肯定会滴答作响。这意味着这些参数将不相等，因此不会引发异常。

更改模拟设置以期望任何 JobParameters，例如:

Mockito.doThrow(new JobParametersInvalidException("Invalid")).when(mockJobLauncher).run(eq(mockjob), any(JobParameters.class));