Mockito

官网链接

https://junit.org/junit5/docs/current/api/
https://site.mockito.org/
http://powermock.github.io/
https://javadoc.io/doc/org.mockito/mockito-core/latest/org/mockito/Mockito.html

创建一个 Mock 对象

LinkedList mockedList = mock(LinkedList.class);

Mock 成员变量值

import org.powermock.reflect.Whitebox;

@Mock
private Student student;
Whitebox.setInternalState(student, "age", 12);