[[case]] # move file
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_file_open(&lfs, &file, "a/hello", LFS_O_CREAT | LFS_O_WRONLY) => 0;
    lfs_file_write(&lfs, &file, "hola\n", 5) => 5;
    lfs_file_write(&lfs, &file, "bonjour\n", 8) => 8;
    lfs_file_write(&lfs, &file, "ohayo\n", 6) => 6;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hello", "c/hello") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hello") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 5+8+6);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 5) => 5;
    memcmp(buffer, "hola\n", 5) => 0;
    lfs_file_read(&lfs, &file, buffer, 8) => 8;
    memcmp(buffer, "bonjour\n", 8) => 0;
    lfs_file_read(&lfs, &file, buffer, 6) => 6;
    memcmp(buffer, "ohayo\n", 6) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "d/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move file corrupt source
in = "lfs.c"
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_file_open(&lfs, &file, "a/hello", LFS_O_CREAT | LFS_O_WRONLY) => 0;
    lfs_file_write(&lfs, &file, "hola\n", 5) => 5;
    lfs_file_write(&lfs, &file, "bonjour\n", 8) => 8;
    lfs_file_write(&lfs, &file, "ohayo\n", 6) => 6;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hello", "c/hello") => 0;
    lfs_unmount(&lfs) => 0;

    // corrupt the source
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_block_t block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    uint8_t bbuffer[LFS_BLOCK_SIZE];
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    int off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hello") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 5+8+6);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 5) => 5;
    memcmp(buffer, "hola\n", 5) => 0;
    lfs_file_read(&lfs, &file, buffer, 8) => 8;
    memcmp(buffer, "bonjour\n", 8) => 0;
    lfs_file_read(&lfs, &file, buffer, 6) => 6;
    memcmp(buffer, "ohayo\n", 6) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "d/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move file corrupt source and dest
in = "lfs.c"
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_file_open(&lfs, &file, "a/hello", LFS_O_CREAT | LFS_O_WRONLY) => 0;
    lfs_file_write(&lfs, &file, "hola\n", 5) => 5;
    lfs_file_write(&lfs, &file, "bonjour\n", 8) => 8;
    lfs_file_write(&lfs, &file, "ohayo\n", 6) => 6;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hello", "c/hello") => 0;
    lfs_unmount(&lfs) => 0;

    // corrupt the source
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_block_t block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    uint8_t bbuffer[LFS_BLOCK_SIZE];
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    int off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    // corrupt the destination
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hello") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 5+8+6);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 5) => 5;
    memcmp(buffer, "hola\n", 5) => 0;
    lfs_file_read(&lfs, &file, buffer, 8) => 8;
    memcmp(buffer, "bonjour\n", 8) => 0;
    lfs_file_read(&lfs, &file, buffer, 6) => 6;
    memcmp(buffer, "ohayo\n", 6) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "d/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move file after corrupt
in = "lfs.c"
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_file_open(&lfs, &file, "a/hello", LFS_O_CREAT | LFS_O_WRONLY) => 0;
    lfs_file_write(&lfs, &file, "hola\n", 5) => 5;
    lfs_file_write(&lfs, &file, "bonjour\n", 8) => 8;
    lfs_file_write(&lfs, &file, "ohayo\n", 6) => 6;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hello", "c/hello") => 0;
    lfs_unmount(&lfs) => 0;

    // corrupt the source
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_block_t block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    uint8_t bbuffer[LFS_BLOCK_SIZE];
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    int off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    // corrupt the destination
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    // continue move
    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hello", "c/hello") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hello") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 5+8+6);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 5) => 5;
    memcmp(buffer, "hola\n", 5) => 0;
    lfs_file_read(&lfs, &file, buffer, 8) => 8;
    memcmp(buffer, "bonjour\n", 8) => 0;
    lfs_file_read(&lfs, &file, buffer, 6) => 6;
    memcmp(buffer, "ohayo\n", 6) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "d/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # simple reentrant move file
reentrant = true
code = '''
    err = lfs_mount(&lfs, &cfg);
    if (err) {
        lfs_format(&lfs, &cfg) => 0;
        lfs_mount(&lfs, &cfg) => 0;
    }
    err = lfs_mkdir(&lfs, "a");
    assert(!err || err == LFS_ERR_EXIST);
    err = lfs_mkdir(&lfs, "b");
    assert(!err || err == LFS_ERR_EXIST);
    err = lfs_mkdir(&lfs, "c");
    assert(!err || err == LFS_ERR_EXIST);
    err = lfs_mkdir(&lfs, "d");
    assert(!err || err == LFS_ERR_EXIST);
    lfs_unmount(&lfs) => 0;

    while (true) {
        lfs_mount(&lfs, &cfg) => 0;
        // there should never exist _2_ hello files
        int count = 0;
        if (lfs_stat(&lfs, "a/hello", &info) == 0) {
            assert(strcmp(info.name, "hello") == 0);
            assert(info.type == LFS_TYPE_REG);
            assert(info.size == 5+8+6 || info.size == 0);
            count += 1;
        }
        if (lfs_stat(&lfs, "b/hello", &info) == 0) {
            assert(strcmp(info.name, "hello") == 0);
            assert(info.type == LFS_TYPE_REG);
            assert(info.size == 5+8+6);
            count += 1; 
        }
        if (lfs_stat(&lfs, "c/hello", &info) == 0) {
            assert(strcmp(info.name, "hello") == 0);
            assert(info.type == LFS_TYPE_REG);
            assert(info.size == 5+8+6);
            count += 1;
        }
        if (lfs_stat(&lfs, "d/hello", &info) == 0) {
            assert(strcmp(info.name, "hello") == 0);
            assert(info.type == LFS_TYPE_REG);
            assert(info.size == 5+8+6);
            count += 1;
        }
        assert(count <= 1);
        lfs_unmount(&lfs) => 0;

        lfs_mount(&lfs, &cfg) => 0;
        if (lfs_stat(&lfs, "a/hello", &info) == 0 && info.size > 0) {
            lfs_rename(&lfs, "a/hello", "b/hello") => 0;
        } else if (lfs_stat(&lfs, "b/hello", &info) == 0) {
            lfs_rename(&lfs, "b/hello", "c/hello") => 0;
        } else if (lfs_stat(&lfs, "c/hello", &info) == 0) {
            lfs_rename(&lfs, "c/hello", "d/hello") => 0;
        } else if (lfs_stat(&lfs, "d/hello", &info) == 0) {
            // success
            break;
        } else {
            // create file
            lfs_file_open(&lfs, &file, "a/hello",
                    LFS_O_WRONLY | LFS_O_CREAT) => 0;
            lfs_file_write(&lfs, &file, "hola\n", 5) => 5;
            lfs_file_write(&lfs, &file, "bonjour\n", 8) => 8;
            lfs_file_write(&lfs, &file, "ohayo\n", 6) => 6;
            lfs_file_close(&lfs, &file) => 0;
        }
        lfs_unmount(&lfs) => 0;
    }

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "d") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hello") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 5+8+6);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "d/hello", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 5) => 5;
    memcmp(buffer, "hola\n", 5) => 0;
    lfs_file_read(&lfs, &file, buffer, 8) => 8;
    memcmp(buffer, "bonjour\n", 8) => 0;
    lfs_file_read(&lfs, &file, buffer, 6) => 6;
    memcmp(buffer, "ohayo\n", 6) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move dir
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_mkdir(&lfs, "a/hi") => 0;
    lfs_mkdir(&lfs, "a/hi/hola") => 0;
    lfs_mkdir(&lfs, "a/hi/bonjour") => 0;
    lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hi", "c/hi") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hi") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "a/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "b/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "c/hi") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "bonjour") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hola") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "ohayo") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "d/hi") => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move dir corrupt source
in = "lfs.c"
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_mkdir(&lfs, "a/hi") => 0;
    lfs_mkdir(&lfs, "a/hi/hola") => 0;
    lfs_mkdir(&lfs, "a/hi/bonjour") => 0;
    lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hi", "c/hi") => 0;
    lfs_unmount(&lfs) => 0;

    // corrupt the source
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_block_t block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    uint8_t bbuffer[LFS_BLOCK_SIZE];
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    int off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hi") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "a/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "b/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "c/hi") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "bonjour") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hola") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "ohayo") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "d/hi") => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move dir corrupt source and dest
in = "lfs.c"
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_mkdir(&lfs, "a/hi") => 0;
    lfs_mkdir(&lfs, "a/hi/hola") => 0;
    lfs_mkdir(&lfs, "a/hi/bonjour") => 0;
    lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hi", "c/hi") => 0;
    lfs_unmount(&lfs) => 0;

    // corrupt the source
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_block_t block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    uint8_t bbuffer[LFS_BLOCK_SIZE];
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    int off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    // corrupt the destination
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hi") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "a/hi") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "bonjour") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hola") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "ohayo") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "b/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "c/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "d/hi") => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move dir after corrupt
in = "lfs.c"
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_mkdir(&lfs, "a/hi") => 0;
    lfs_mkdir(&lfs, "a/hi/hola") => 0;
    lfs_mkdir(&lfs, "a/hi/bonjour") => 0;
    lfs_mkdir(&lfs, "a/hi/ohayo") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hi", "c/hi") => 0;
    lfs_unmount(&lfs) => 0;

    // corrupt the source
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_block_t block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    uint8_t bbuffer[LFS_BLOCK_SIZE];
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    int off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    // corrupt the destination
    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    block = dir.m.pair[0];
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
    cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    off = LFS_BLOCK_SIZE-1;
    while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
        off -= 1;
    }
    memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
    cfg.erase(&cfg, block) => 0;
    cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
    cfg.sync(&cfg) => 0;

    // continue move
    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hi", "c/hi") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "c") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hi") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "a/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "b/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "c/hi") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "bonjour") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hola") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "ohayo") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "d/hi") => LFS_ERR_NOENT;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # simple reentrant move dir
reentrant = true
code = '''
    err = lfs_mount(&lfs, &cfg);
    if (err) {
        lfs_format(&lfs, &cfg) => 0;
        lfs_mount(&lfs, &cfg) => 0;
    }
    err = lfs_mkdir(&lfs, "a");
    assert(!err || err == LFS_ERR_EXIST);
    err = lfs_mkdir(&lfs, "b");
    assert(!err || err == LFS_ERR_EXIST);
    err = lfs_mkdir(&lfs, "c");
    assert(!err || err == LFS_ERR_EXIST);
    err = lfs_mkdir(&lfs, "d");
    assert(!err || err == LFS_ERR_EXIST);
    lfs_unmount(&lfs) => 0;

    while (true) {
        lfs_mount(&lfs, &cfg) => 0;
        // there should never exist _2_ hi directories
        int count = 0;
        if (lfs_stat(&lfs, "a/hi", &info) == 0) {
            assert(strcmp(info.name, "hi") == 0);
            assert(info.type == LFS_TYPE_DIR);
            count += 1;
        }
        if (lfs_stat(&lfs, "b/hi", &info) == 0) {
            assert(strcmp(info.name, "hi") == 0);
            assert(info.type == LFS_TYPE_DIR);
            count += 1; 
        }
        if (lfs_stat(&lfs, "c/hi", &info) == 0) {
            assert(strcmp(info.name, "hi") == 0);
            assert(info.type == LFS_TYPE_DIR);
            count += 1;
        }
        if (lfs_stat(&lfs, "d/hi", &info) == 0) {
            assert(strcmp(info.name, "hi") == 0);
            assert(info.type == LFS_TYPE_DIR);
            count += 1;
        }
        assert(count <= 1);
        lfs_unmount(&lfs) => 0;

        lfs_mount(&lfs, &cfg) => 0;
        if (lfs_stat(&lfs, "a/hi", &info) == 0) {
            lfs_rename(&lfs, "a/hi", "b/hi") => 0;
        } else if (lfs_stat(&lfs, "b/hi", &info) == 0) {
            lfs_rename(&lfs, "b/hi", "c/hi") => 0;
        } else if (lfs_stat(&lfs, "c/hi", &info) == 0) {
            lfs_rename(&lfs, "c/hi", "d/hi") => 0;
        } else if (lfs_stat(&lfs, "d/hi", &info) == 0) {
            break; // success
        } else {
            // create dir and rename for atomicity
            err = lfs_mkdir(&lfs, "temp");
            assert(!err || err == LFS_ERR_EXIST);
            err = lfs_mkdir(&lfs, "temp/hola");
            assert(!err || err == LFS_ERR_EXIST);
            err = lfs_mkdir(&lfs, "temp/bonjour");
            assert(!err || err == LFS_ERR_EXIST);
            err = lfs_mkdir(&lfs, "temp/ohayo");
            assert(!err || err == LFS_ERR_EXIST);
            lfs_rename(&lfs, "temp", "a/hi") => 0;
        }
        lfs_unmount(&lfs) => 0;
    }

    lfs_mount(&lfs, &cfg) => 0;
    lfs_dir_open(&lfs, &dir, "a") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_dir_open(&lfs, &dir, "d") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hi") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "a/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "b/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "c/hi") => LFS_ERR_NOENT;
    lfs_dir_open(&lfs, &dir, "d/hi") => 0;
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, ".") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "..") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "bonjour") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "hola") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "ohayo") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;
    lfs_unmount(&lfs) => 0;
'''

[[case]] # move state stealing
code = '''
    lfs_format(&lfs, &cfg) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_mkdir(&lfs, "a") => 0;
    lfs_mkdir(&lfs, "b") => 0;
    lfs_mkdir(&lfs, "c") => 0;
    lfs_mkdir(&lfs, "d") => 0;
    lfs_file_open(&lfs, &file, "a/hello", LFS_O_CREAT | LFS_O_WRONLY) => 0;
    lfs_file_write(&lfs, &file, "hola\n", 5) => 5;
    lfs_file_write(&lfs, &file, "bonjour\n", 8) => 8;
    lfs_file_write(&lfs, &file, "ohayo\n", 6) => 6;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "a/hello", "b/hello") => 0;
    lfs_unmount(&lfs) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "b/hello", "c/hello") => 0;
    lfs_unmount(&lfs) => 0;
    lfs_mount(&lfs, &cfg) => 0;
    lfs_rename(&lfs, "c/hello", "d/hello") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "d/hello", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 5) => 5;
    memcmp(buffer, "hola\n", 5) => 0;
    lfs_file_read(&lfs, &file, buffer, 8) => 8;
    memcmp(buffer, "bonjour\n", 8) => 0;
    lfs_file_read(&lfs, &file, buffer, 6) => 6;
    memcmp(buffer, "ohayo\n", 6) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_remove(&lfs, "b") => 0;
    lfs_remove(&lfs, "c") => 0;
    lfs_unmount(&lfs) => 0;

    lfs_mount(&lfs, &cfg) => 0;
    lfs_stat(&lfs, "a", &info) => 0;
    lfs_stat(&lfs, "b", &info) => LFS_ERR_NOENT;
    lfs_stat(&lfs, "c", &info) => LFS_ERR_NOENT;
    lfs_stat(&lfs, "d", &info) => 0;
    lfs_file_open(&lfs, &file, "a/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "b/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "c/hello", LFS_O_RDONLY) => LFS_ERR_NOENT;
    lfs_file_open(&lfs, &file, "d/hello", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 5) => 5;
    memcmp(buffer, "hola\n", 5) => 0;
    lfs_file_read(&lfs, &file, buffer, 8) => 8;
    memcmp(buffer, "bonjour\n", 8) => 0;
    lfs_file_read(&lfs, &file, buffer, 6) => 6;
    memcmp(buffer, "ohayo\n", 6) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;
'''