Java Junit测试中异常HashMap返回null后

在我的项目中，在DAO类中，在delete方法中，作为delete响应，我返回了一个HashMap。我用过JPA和Spring Boot。在Try-Catch中，成功删除后，映射中的“作为键”状态将被置为“作为值字符串”OK

正如我们所知，在JPA中，若主键未找到实体，则在删除时会发生异常。异常发生后，HasMap中的as键状态将被置位，as值字符串将失败

这个HashMap将由DAO delete方法返回，我的意图是在JUnit中使用它进行断言。现在的问题是：成功删除它可以正常工作，但是如果我试图删除一个不存在的实体，那么键值分配在Dao方法中工作，但是当我试图在JUnit测试方法中访问它时，它显示为null。即使我已经在delete方法中打印了HasMap，它显示了它的键值，但在Junit中，同时显示null

单元测试代码

案例2

案例3

要成功删除，消息如下所示：

    response (dao) : {status=OK}
    //hibernate sql show
    response (test) : {status=OK}

到目前为止，我可以理解，作为异常，当试图删除一个空实体时，HasMap键值对赋值是在Dao delete方法中，但返回到测试方法

可能的原因是什么

代码完整代码可在GitHub中访问：

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这是一个开源项目，欢迎您参与

您正在使用嵌套的JPA方法find and delete 如果标识符为null，find方法将引发异常

@Override
    public Map<String, String> delete(String id) {
        System.out.println("DAO Delete: ");
        Map<String, String> response = new HashMap<>();
        String s = "";
        try {
            ProfileBasic profileBasic = entityManager.find(ProfileBasic.class, new Long(id));
            entityManager.remove(profileBasic);
            s = "OK";
        } catch (Exception e) {
            s = "FAIL";
            System.out.println("Profile Basic Delete Fail!");
//            e.printStackTrace();
        }
        response.put("status", s);
        System.out.println("response (dao) : "+ response.toString());
        return response;
    }

Profile Basic Delete Fail!
response (dao) : {status=FAIL}
Test Delete Fail!
response (test) : {}

@Override
    public Map<String, String> delete(String id) {
        System.out.println("DAO Delete: ");
        Map<String, String> response = new HashMap<>();
        try {
            ProfileBasic profileBasic = entityManager.find(ProfileBasic.class, new Long(id));
            entityManager.remove(profileBasic);
            response.put("status","OK");
        } catch (Exception e) {
            System.out.println("Profile Basic Delete Fail!");
            response.put("status","FAIL");
//            e.printStackTrace();
        }
        System.out.println("response (dao) : "+ response.toString());
        return response;
    }

Profile Basic Delete Fail!
response (dao) : {status=FAIL}
Test Delete Fail!
response (test) : {}

@Override
    public Map<String, String> delete(String id) {
        System.out.println("DAO Delete: ");
        Map<String, String> response = new HashMap<>();
        ProfileBasic profileBasic=null;
        try {
            profileBasic = entityManager.find(ProfileBasic.class, new Long(id));
            response.put("status", "OK");
        } catch (Exception e) {
            System.out.println("Profile Basic Delete Fail!");
            response.put("status", "FAIL");
//            e.printStackTrace();
        }
        entityManager.remove(profileBasic);
        System.out.println("response (dao) : " + response.toString());
        return response;
    }

Profile Basic Delete Fail!
response (dao) : {status=FAIL}
Test Delete Fail!
response (test) : {}

    response (dao) : {status=OK}
    //hibernate sql show
    response (test) : {status=OK}