You would need a spy, not a mock A:
A a = Mockito.spy(new A(1,1));
a.getPrice(2);
verify(a, times(1)).getPriceForOne();
How to verify if method was called from other with same class by mockito
You would need a spy, not a mock A:
A a = Mockito.spy(new A(1,1));
a.getPrice(2);
verify(a, times(1)).getPriceForOne();