Spring-Batch：测试步骤范围步骤

Question

我正在尝试测试 Spring Batch 步骤。我有 2 个场景要测试 1. 使用 tasklet 步骤（步骤范围） 2. Step with ItemReader/ItemWriter (step scope)

我的测试类注释如下

@RunWith(SpringJUnit4ClassRunner.class)
@TestExecutionListeners({DependencyInjectionTestExecutionListener.class, StepScopeTestExecutionListener.class})
@ContextConfiguration(loader = SpringApplicationContextLoader.class, classes = ItemReturnsApplication.class)

This is how my test class looks like

@Bean
    JobLauncherTestUtils jobLauncherTestUtils(){
        return new JobLauncherTestUtils();
    }

    @Autowired
    private JobLauncherTestUtils jobLauncherTestUtils;

@Test
    public void testLaunchJob() throws Exception{
        JobExecution jobExecution = jobLauncherTestUtils.launchJob(
                new JobParametersBuilder().addString("chunkSize", "3").addString("current_date","2016-11-25").toJobParameters()
        );
        commonAssertions(jobLauncherTestUtils.launchJob());
        assertEquals(BatchStatus.COMPLETED, jobExecution.getStatus());
    }

当我运行测试用例时，该过程失败，因为作业参数没有传递到我的作业中。

我正在寻找在 Spring Batch 中测试 Step Scoped 步骤的正确方法。

谢谢， 开源浏览器

Answer 1

您当前的代码尝试启动和测试作业而不是步骤。根据spring batch documentation关于如何测试单个步骤的说明，一个简单的例子说明如何测试一个tasklet，并在tasklet中注入上下文，更符合如下代码：

@ContextConfiguration
@TestExecutionListeners( { DependencyInjectionTestExecutionListener.class,
    StepScopeTestExecutionListener.class })
@RunWith(SpringJUnit4ClassRunner.class)
public class StepScopeTestExecutionListenerIntegrationTests {

    // This component is defined step-scoped, so it cannot be injected unless
    // a step is active...
    @Autowired
    private YourTaskletClass yourTaskletClass;

    public StepExecution getStepExection() {
        StepExecution execution = MetaDataInstanceFactory.createStepExecution();
        execution.getExecutionContext().putString("input.data", "foo,bar,spam");
        return execution;
    }

    @Test
    public void testYourTaskletClass() {
        // The tasklet is initialized and some configuration is already set by the MetaDatAInstanceFactory           
        assertNotNull(yourTaskletClass.doSomething());
    }

}

@RunWith(SpringJUnit4ClassRunner.class) 注解仅适用于 Spring Boot 1.4 及更高版本。有关详细信息，请参阅 this 博客。

要启动单个步骤，请尝试将您的代码调整为：

@RunWith(SpringJUnit4ClassRunner.class)
@TestExecutionListeners({DependencyInjectionTestExecutionListener.class, StepScopeTestExecutionListener.class})
@ContextConfiguration(loader = SpringApplicationContextLoader.class, classes = ItemReturnsApplication.class)    
public class StepIntegrationTest {

    @Autowired
    private JobLauncherTestUtils jobLauncherTestUtils;

    @Test
    public void testLaunchJob() throws Exception{
       JobExecution jobExecution = jobLauncherTestUtils.launchStep("nameOfYourStep");

    } 
}