java - Using PowerMockito to mock method with void return-type: "invalid void parameter" -

i having trouble trying unit test java code @ point calls native methods. basically, trying use powermockito mock class call native. able mock non-void methods fine, keep getting compilation errors when try mock method of void return type. here example of code i'm trying test:

public class classthatcallsnative {      void initobject(bytebuffer param1, int param2) {         //calls native     }      int getid(int param1) {         //calls native     } } 

i have code in test class:

powermockito.when(mclassthatcallsnative.getid(mockit.anyint())).thenreturn(0); 

this line of code compiles fine, following line compilation error:

powermockito.when(mclassthatcallsnative.initobject(mockit.any(bytebuffer.class), anyint())).donothing(); 

the error message says invalid void parameter , points .initobject. idea doing wrong?

for void methods, need use below one

powermockito.donothing().when(mclassthatcallsnative.initobject(mockit.any(bytebuffer.class), anyint()))