/**
     * Happy path – verifies that getters return the values supplied by the
     * implementation.
     */
    @Test
    @DisplayName("verify getters return stubbed values")
    void testGettersHappyPath() {
        when(mockAllocInfo.getCapacity()).thenReturn(1000L);
        when(mockAllocInfo.getFree()).thenReturn(400L);

        assertEquals(1000L, mockAllocInfo.getCapacity(), "capacity should match stubbed value");