def METHOD_NAME():
    n = norcow.Norcow()
    n.init()
    n.set(0x0101, b"ahoj")
    n.set(0x0101, b"a" * (consts.NORCOW_SECTOR_SIZE - 100))
    n.set(0x0101, b"hello")
    n.set(0x0103, b"123456789x")
    n.set(0x0104, b"123456789x")
    n.set(0x0105, b"123456789x")
    n.set(0x0106, b"123456789x")
    mem = n._dump()
    assert mem[0][:8] == consts.NORCOW_MAGIC_AND_VERSION
    assert mem[0][200:300] == b"\x00" * 100
    # compact is triggered
    n.set(0x0107, b"123456789x")
    mem = n._dump()
    # assert the other sector is active
    assert mem[1][:8] == consts.NORCOW_MAGIC_AND_VERSION
    # assert the deleted item was not copied
    assert mem[0][200:300] == b"\xff" * 100
    n.set(0x0108, b"123456789x")
    n.set(0x0109, b"123456789x")
    assert n.get(0x0101) == b"hello"
    assert n.get(0x0103) == b"123456789x"