class A {
        public int aaa() { return 1; }
    }

    class B {
        A classA;

        B(A classA) { this.classA = classA; }

        public int getAAA() { return classA.aaa(); }
    }

    A spyA = mock(A.class);
    when(spyA.aaa()).thenReturn(10);

    A AA = new A();
    int res = new B(AA).getAAA();
    Logxx.d("RESULT: " + res);