java - 模拟 isAssignableFrom()

Question

我有两个 java 类，如下所示，

public class Class1{
    private Object actionObject;    
    public Object getActionObject() {
        return actionObject;
    }
    public void setActionObject(Object actionObject) {
        this.actionObject = actionObject;
    }
}

二等

 public class Class2 {
    private Long id;
    private int idver;  
    private int valueDate;
}

有如下两条语句，

Class1 deserializedValue = (Class1) event.getDeserializedValue();

Class2.class.isAssignableFrom(deserializedValue.getActionObject().getClass());

我想模拟第二个语句

Class2.class.isAssignableFrom(deserializedValue.getActionObject().getClass());

我该怎么做？

Answer 1

出于测试目的，您可以使用策略模式。您只需要一个具有两种不同实现的接口(interface)或抽象类。其中之一是模拟实现，如下所示:

public interface EventStrategy {

    // More methods...

    boolean isAssignableFrom(final Object object);

}

public class MyEvent implements EventStrategy {

    public boolean isAssignableFrom(final Object object) {
        return Class2.class.isAssignableFrom(object.getClass());
    }

}

public class MockEvent implements EventStrategy {

    public boolean isAssignableFrom(final Object object) {
        return true;
    }

}