Page<Coupon> page = startPage();
时间: 2024-05-27 19:14:57 浏览: 13
As an AI language model, I don't have enough context to provide a specific answer. However, based on the code snippet given, it seems like the code is using a paging mechanism to retrieve a list of coupons.
The method startPage() is likely a custom method that sets up the paging configuration and returns a Page object. The Page object contains information about the current page, the total number of pages, and the list of items on the current page.
The code snippet may be part of a larger application that displays a list of coupons to the user. By using paging, the application can limit the amount of data retrieved from the database and improve performance.
相关问题
public static Predicate predicateCoupons(CriteriaBuilder criteriaBuilder, Root<?> root, List<Coupon> coupons) { CriteriaBuilder.In<Coupon> in = criteriaBuilder.in(root.get("coupon")); coupons.forEach(in::value); return criteriaBuilder.and(in); }这个写单元测试
可以使用JUnit框架编写单元测试。需要先准备好测试数据和Mock对象。
假设我们有一个Coupon类:
```java
public class Coupon {
private String code;
// getter and setter
}
```
然后编写单元测试:
```java
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import java.util.List;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaBuilder.In;
import javax.persistence.criteria.Root;
import org.junit.Test;
public class CouponPredicateTest {
@Test
public void testPredicateCoupons() {
// 准备测试数据
Coupon coupon1 = new Coupon();
coupon1.setCode("coupon1");
Coupon coupon2 = new Coupon();
coupon2.setCode("coupon2");
List<Coupon> coupons = Arrays.asList(coupon1, coupon2);
// 创建Mock对象
CriteriaBuilder criteriaBuilder = mock(CriteriaBuilder.class);
In<Coupon> in = mock(In.class);
Root<?> root = mock(Root.class);
// 设置Mock对象的行为
when(criteriaBuilder.in(root.get("coupon"))).thenReturn(in);
when(in.value(coupon1)).thenReturn(in);
when(in.value(coupon2)).thenReturn(in);
// 调用被测试的方法
Predicate result = predicateCoupons(criteriaBuilder, root, coupons);
// 断言结果
assertEquals(result.toString(), "coupon in (coupon1,coupon2)");
}
}
```
这个测试用例,通过mockito模拟了CriteriaBuilder和In对象的行为,然后调用被测试的`predicateCoupons`方法,最后断言结果是否符合预期。
<div class="content"> <div class="tab_coupon"> <div data-type="3">已过期<p></p></div> <div data-type="2">已使用<p></p></div> <div class="active" data-type="1">待使用<p></p></div> </div></div> $(function(){ $(".head-title span").click(function(){ history.go(-1); }); $(".tab_coupon > div").off('click').click(function(){ $(".tab_coupon div").removeClass("active"); $(this).addClass("active"); var type = $(this).data("type"); $(".list_coupon div").each(function(n){ $(this).hide(); if(n + 1 == type) $(this).show(); }); }); 此处代码如何修改成点击文字才会触发点击事件
您可以将点击事件绑定到div内部的文本元素上,而不是绑定到整个div元素上。例如:
```
<div class="tab_coupon">
<div data-type="3"><p>已过期</p></div>
<div data-type="2"><p>已使用</p></div>
<div class="active" data-type="1"><p>待使用</p></div>
</div>
```
```
$(".tab_coupon > div > p").off('click').click(function(){
$(".tab_coupon div").removeClass("active");
$(this).parent().addClass("active");
var type = $(this).parent().data("type");
$(".list_coupon div").each(function(n){
$(this).hide();
if(n + 1 == type) $(this).show();
});
});
```
这样,点击div内部的文本元素时才会触发点击事件,而不是整个div元素。
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