== 单元测试应用示例——测试标签库 ==
AdSumQueryTag.java是后台查询推广来源统计结果的业务逻辑标签处理程序。[[BR]]
{{{ #!java
/**
 * 
 * @author ChenYang
 * Date: 2012-2-1
 */
public class AdSumQueryTag extends BaseTagSupport<AdService> {
	
	private String items;
	
	public void setItems(String items) {
		this.items = items;
	}

	@Override
	public int doStartTag() throws JspException {
		
		HttpServletRequest request = this.getHttpServletRequest();
		
		if(StringUtils.isBlank(request.getParameter("gid"))){
			throw new RuntimeException("没有选择游戏");
		}
		
		if(StringUtils.isBlank(request.getParameter("startdate"))){
			throw new RuntimeException("没有选择开始时间");
		}
		
		if(StringUtils.isBlank(request.getParameter("enddate"))){
			throw new RuntimeException("没有选择结束时间");
		}
		
		long gameid = Long.parseLong(request.getParameter("gid"));
		
		Date start = null;
		Date end = null;
		try {
			start = DateUtils.parseDate(request.getParameter("startdate"), new String[]{"yyyy-MM-dd"});
			String enddate = request.getParameter("enddate");
			enddate = enddate + " 23:59:59 999";
			
			end = DateUtils.parseDate(enddate, new String[]{"yyyy-MM-dd HH:mm:ss SSS"});
		} catch (ParseException e) {
			e.printStackTrace();
		}
		AdService adService = this.getBean("adService");
		List<AdSum> list = adService.findByCondi(gameid, start, end);
		
		this.pageContext.setAttribute(items, list);
		
		return Tag.SKIP_BODY;
	}
	
}
}}}
该标签依赖的ApplicationContext对象，可以通过继承AbstractTransactionalJUnit4SpringContextTests获得,HttpServletRequest对象和pageContext对象可以通过Spring测试框架提供的模拟对象来模拟。
测试代码如下:
{{{ #!java
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:applicationContext.xml" })
public class AdSumQueryTagTest extends AbstractTransactionalJUnit4SpringContextTests{
	
	@Test
	public void doStartTag() throws Exception {
		
		AdSumQueryTag adSumQueryTag = new AdSumQueryTag();
		adSumQueryTag.setApplicationContext(applicationContext);
		adSumQueryTag.setItems("items");
		
                //模拟HttpServletRequest
		MockHttpServletRequest request = new MockHttpServletRequest();
                
                //模拟查询条件
		request.addParameter("gid", "1");
		request.addParameter("startdate", "2012-02-08");
		request.addParameter("enddate", "2012-02-08");
		
                //模拟pageContext
		MockPageContext pageContext = new MockPageContext();
		
		adSumQueryTag.setHttpServletRequest(request);
		adSumQueryTag.setPageContext(pageContext);
		
		adSumQueryTag.doStartTag();
		
	}
}

}}}