assertEquals(expectedFree, actualFree);
            verify(mockAllocInfo, times(1)).getFree();
        }

        @Test
        @DisplayName("Should handle multiple invocations")
        void shouldHandleMultipleInvocations() {
            // Given
            when(mockAllocInfo.getCapacity()).thenReturn(1000L, 2000L, 3000L);
            when(mockAllocInfo.getFree()).thenReturn(500L, 1000L, 1500L);

            // When & Then