@Test public void test_freePhysRecSize2FreeSlot_incremental(){

    int oldSlot = -1;
    for(int size = 1;size<= StorageDirect.MAX_RECORD_SIZE;size++){
        int slot = engine.freePhysRecSize2FreeSlot(size);
        assertTrue(slot >= 0);
        assertTrue(oldSlot <= slot);
        assertTrue(slot - oldSlot <= 1);
        oldSlot= slot;
    }
    assertEquals(StorageDirect.NUMBER_OF_PHYS_FREE_SLOT - 1, oldSlot);
}