[Mockito] Previous MockitoSession was not concluded with 'finishMocking()'. 에러

문제

Unfinished mocking session detected.
Previous MockitoSession was not concluded with 'finishMocking()'.
For examples of correct usage see javadoc for MockitoSession class.
org.mockito.exceptions.misusing.UnfinishedMockingSessionException: 
Unfinished mocking session detected.
Previous MockitoSession was not concluded with 'finishMocking()'.
For examples of correct usage see javadoc for MockitoSession class.
at com.xxxxx.xxxxxx.xxxxxxxxxxx.setUp(XXXjava:59)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

원인

모킹세션 끝나지 않음.
Unfinished mocking session detected.

해결방법

해결방법 1)

mSession = mockitoSession().startMocking();
mSession.finishMocking();
이 둘을 지워줘야한다.
쓸모없는 mockito세션이 남아있어서 그렇다.

해결방법 2)
@After부분에 Mokcing을 finish 해준다.
mSession.finishMocking();