how to trigger and stop scheduled batch job (#4671)

spring-batch/src/test/java/org/baeldung/batchscheduler/SpringBatchSchedulerIntegrationTest.java

@@ -0,0 +1,60 @@
+package org.baeldung.batchscheduler;
+
+import java.util.Date;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.scheduling.TaskScheduler;
+import org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = SpringBatchScheduler.class)
+public class SpringBatchSchedulerIntegrationTest {
+
+    private static final int TIMER = 3000;
+
+    @Autowired
+    private ApplicationContext context;
+
+    @Test
+    public void stopJobsWhenSchedulerDisabled() throws Exception {
+        Thread.sleep(TIMER);
+        SpringBatchScheduler schedulerBean = context.getBean(SpringBatchScheduler.class);
+        schedulerBean.stop();
+        Thread.sleep(TIMER);
+        Date lastLaunchDate = schedulerBean.getCurrentLaunchDate();
+        Thread.sleep(TIMER);
+        Assert.assertEquals(lastLaunchDate, schedulerBean.getCurrentLaunchDate());
+    }
+
+    @Test
+    public void stopJobSchedulerWhenSchedulerDestroyed() throws Exception {
+        Thread.sleep(TIMER);
+        ScheduledAnnotationBeanPostProcessor bean = context.getBean(ScheduledAnnotationBeanPostProcessor.class);
+        SpringBatchScheduler schedulerBean = context.getBean(SpringBatchScheduler.class);
+        bean.postProcessBeforeDestruction(schedulerBean, "SpringBatchScheduler");
+        Thread.sleep(TIMER);
+        Date lastLaunchTime = schedulerBean.getCurrentLaunchDate();
+        Thread.sleep(TIMER);
+        Assert.assertEquals(lastLaunchTime, schedulerBean.getCurrentLaunchDate());
+
+    }
+
+    @Test
+    public void stopJobSchedulerWhenFutureTasksCancelled() throws Exception {
+        Thread.sleep(TIMER);
+        SpringBatchScheduler schedulerBean = context.getBean(SpringBatchScheduler.class);
+        schedulerBean.cancelFutureSchedulerTasks();
+        Thread.sleep(TIMER);
+        Date lastLaunchTime = schedulerBean.getCurrentLaunchDate();
+        Thread.sleep(TIMER);
+        Assert.assertEquals(lastLaunchTime, schedulerBean.getCurrentLaunchDate());
+
+    }
+    
+}