java 使用 Mockito 模拟静态字段
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/26274705/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Mocking static fields with Mockito
提问by Iker Aguayo
I have something like this (it is a third party library so I have to work with this design):
我有这样的东西（它是第三方库，所以我必须使用这个设计）：
ClassA.conn1.getObjectA().getIntValue()
ClassA is a normal class, and inside it there is a public static field (conn1). This conn1 is a class which have a connection and some other values which are used in the application (in my case that ObjectA).
ClassA 是一个普通的类，里面有一个公共静态字段（conn1）。这个 conn1 是一个类，它有一个连接和一些在应用程序中使用的其他值（在我的例子中是 ObjectA）。
This value is passed as parameter in the dao I am mocking. That value is mocked as Matchers.anyInt() but I get a NullPointerException because conn1 is null (not the expected int)
这个值在我模拟的 dao 中作为参数传递。该值被模拟为 Matchers.anyInt() 但我得到一个 NullPointerException 因为 conn1 为空（不是预期的 int）
I tried some things PowerMockito, the WhiteBox, but without success. Now I have done this, but I get the same NullPointerException
我尝试了一些 PowerMockito，WhiteBox，但没有成功。现在我已经这样做了，但我得到了相同的 NullPointerException
Mockito.when(ClassA.conn1.getObjectA()).thenReturn(new ObjectA(2));
The question is, how can I mock it to get the ObjectA or the int value of the ObjectA
问题是，我如何模拟它以获取 ObjectA 或 ObjectA 的 int 值
采纳答案by lance-java
import static x.y.z.Mockito.*;
ObjectA objectA = mock(ObjectA.class);
when(objectA.getIntValue()).thenReturn(1));
Conn conn1 = mock(Conn.class);
when(conn1.getObjectA()).thenReturn(objectA);
ClassA.conn1 = conn1;
