java - Why does PowerMock try to load some classes, which are used in non-mocking class method? -

i use junit4 mockito unit testing, , i'm trying add powermock toolbox. , @ once i'm facing weird class loading behaviour of powermock. so, use code that:

@preparefortest(classtomock.class) public class mytest {     @rule     public powermockrule rule = new powermockrule();      @test     public void mytest() throws exception     {         // test code using classtomock         myhelper.staticmethod(param);         // other test code     } } 

myhelper class bundle, , staticmethod() method, don't need mocked. method uses google gson , serializers (let's - myserializer class). , powermock throws me javassist.notfoundexception google gson , myserializer. example:

caused by: javassist.notfoundexception: com.google.gson.gsonbuilder @ javassist.classpool.get(classpool.java:450) @ org.powermock.core.classloader.mockclassloader.loadunmockedclass(mockclassloader.java:220) 

i can add classes classpath (to impored-packages), don't want to. , why powermock try load classes, used inside method, supposed "black box", @ first place?

can explain that, please?

also, can rid of loading gson using @powermockignore("com.google.*") annotation, doesn't work myserializer. , doesn't seem proper solution anyway.

thanks!

your classes might using

static blocks

which needs suppressed using powermock, not go , load required classes static blocks

refer link see usage of suppressunwantedbehavior