@Override
			public RepeatStatus call() throws Exception {
				JobParameters jobParameters = chunkContext.getStepContext().getStepExecution().getJobParameters();
				assertEquals(jobParameters.getString("string"), "baz");
				assertEquals((long) jobParameters.getLong("long"), 5l);
				assertEquals(jobParameters.getDate("date"), new Date(1));

				return tasklet.execute(stepContribution, chunkContext);
			}
@author Michael Minella
@author Gary Russell
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/batch/tasklet/JobLaunchingTaskletTests.java