littlefs/tests/test_move.toml

[cases.move_file]
code = '''
    lfs_t lfs;
    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_t file;
    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_t dir;
    struct lfs_info info;
    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;
    uint8_t buffer[1024];
    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;
'''

[cases.nop_move] # yes this is legal
code = '''
    lfs_t lfs;
    lfs_format(&lfs, cfg) => 0;
    lfs_mount(&lfs, cfg) => 0;
    lfs_mkdir(&lfs, "hi") => 0;
    lfs_rename(&lfs, "hi", "hi") => 0;
    lfs_mkdir(&lfs, "hi/hi") => 0;
    lfs_rename(&lfs, "hi/hi", "hi/hi") => 0;
    lfs_mkdir(&lfs, "hi/hi/hi") => 0;
    lfs_rename(&lfs, "hi/hi/hi", "hi/hi/hi") => 0;
    struct lfs_info info;
    lfs_stat(&lfs, "hi/hi/hi", &info) => 0;
    assert(strcmp(info.name, "hi") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_unmount(&lfs) => 0;
'''

[cases.move_file_corrupt_source]
in = "lfs.c"
code = '''
    lfs_t lfs;
    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_t file;
    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_t dir;
    struct lfs_info info;
    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 buffer[BLOCK_SIZE];
    cfg->read(cfg, block, 0, buffer, BLOCK_SIZE) => 0;
    int off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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;
'''

# move file corrupt source and dest
[cases.move_file_corrupt_source_dest]
in = "lfs.c"
if = 'PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
    lfs_t lfs;
    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_t file;
    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_t dir;
    struct lfs_info info;
    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 buffer[BLOCK_SIZE];
    cfg->read(cfg, block, 0, buffer, BLOCK_SIZE) => 0;
    int off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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, buffer, BLOCK_SIZE) => 0;
    off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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;
'''

[cases.move_file_after_corrupt]
in = "lfs.c"
if = 'PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
    lfs_t lfs;
    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_t file;
    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_t dir;
    struct lfs_info info;
    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 buffer[BLOCK_SIZE];
    cfg->read(cfg, block, 0, buffer, BLOCK_SIZE) => 0;
    int off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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, buffer, BLOCK_SIZE) => 0;
    off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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;
'''

[cases.reentrant_move_file]
reentrant = true
code = '''
    lfs_t lfs;
    int 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;
        struct lfs_info info;
        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
            lfs_unmount(&lfs) => 0;
            break;
        } else {
            // create file
            lfs_file_t 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_t dir;
    struct lfs_info info;
    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_t file;
    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;
    uint8_t buffer[1024];
    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;
'''

[cases.move_dir]
code = '''
    lfs_t lfs;
    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_t dir;
    struct lfs_info info;
    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;
'''

[cases.move_dir_corrupt_source]
in = "lfs.c"
code = '''
    lfs_t lfs;
    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_t dir;
    struct lfs_info info;
    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 buffer[BLOCK_SIZE];
    cfg->read(cfg, block, 0, buffer, BLOCK_SIZE) => 0;
    int off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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;
'''

[cases.move_dir_corrupt_source_dest]
in = "lfs.c"
if = 'PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
    lfs_t lfs;
    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_t dir;
    struct lfs_info info;
    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 buffer[BLOCK_SIZE];
    cfg->read(cfg, block, 0, buffer, BLOCK_SIZE) => 0;
    int off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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, buffer, BLOCK_SIZE) => 0;
    off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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;
'''

[cases.move_dir_after_corrupt]
in = "lfs.c"
if = 'PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
    lfs_t lfs;
    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_t dir;
    struct lfs_info info;
    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 buffer[BLOCK_SIZE];
    cfg->read(cfg, block, 0, buffer, BLOCK_SIZE) => 0;
    int off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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, buffer, BLOCK_SIZE) => 0;
    off = BLOCK_SIZE-1;
    while (off >= 0 && buffer[off] == ERASE_VALUE) {
        off -= 1;
    }
    memset(&buffer[off-3], BLOCK_SIZE, 3);
    cfg->erase(cfg, block) => 0;
    cfg->prog(cfg, block, 0, buffer, 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;
'''

[cases.reentrant_move_dir]
reentrant = true
code = '''
    lfs_t lfs;
    int 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;
        struct lfs_info info;
        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) {
            lfs_unmount(&lfs) => 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_t dir;
    struct lfs_info info;
    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;
'''

[cases.move_state_stealing]
code = '''
    lfs_t lfs;
    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_t file;
    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;
    uint8_t buffer[1024];
    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;
    struct lfs_info info;
    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;
'''

# Other specific corner cases

# create + delete in same commit with neighbors
[cases.create_delete_same]
code = '''
    lfs_t lfs;
    lfs_format(&lfs, cfg) => 0;
    lfs_mount(&lfs, cfg) => 0;

    // littlefs keeps files sorted, so we know the order these will be in
    lfs_file_t file;
    lfs_file_open(&lfs, &file, "/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.1", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/2.in_between",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.2", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/4.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.3", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_t files[3];
    lfs_file_open(&lfs, &files[0], "0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "2.in_between",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "4.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.4", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.5", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.6", 7) => 7;

    // rename file while everything is open, this triggers both
    // a create and delete simultaneously
    lfs_rename(&lfs, "/1.move_me", "/3.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;

    // check that nothing was corrupted
    lfs_dir_t dir;
    struct lfs_info info;
    lfs_dir_open(&lfs, &dir, "/") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.in_between") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "3.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 0);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "4.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/0.before", LFS_O_RDONLY) => 0;
    uint8_t buffer[1024];
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.4") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/2.in_between", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.5") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/4.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.6") == 0);
    lfs_file_close(&lfs, &file) => 0;

    // now move back
    lfs_file_open(&lfs, &files[0], "0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "2.in_between",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "4.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.7", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.8", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.9", 7) => 7;

    // rename file while everything is open, this triggers both
    // a create and delete simultaneously
    lfs_rename(&lfs, "/3.move_me", "/1.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;

    // and check that nothing was corrupted again
    lfs_dir_open(&lfs, &dir, "/") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "1.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 0);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.in_between") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "4.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/0.before", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.7") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/2.in_between", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.8") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/4.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.9") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;
'''

# create + delete + delete in same commit with neighbors
[cases.create_delete_delete_same]
code = '''
    lfs_t lfs;
    lfs_format(&lfs, cfg) => 0;
    lfs_mount(&lfs, cfg) => 0;

    // littlefs keeps files sorted, so we know the order these will be in
    lfs_file_t file;
    lfs_file_open(&lfs, &file, "/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/3.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "remove me",
            sizeof("remove me")) => sizeof("remove me");
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.1", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/2.in_between",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.2", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/4.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.3", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_t files[3];
    lfs_file_open(&lfs, &files[0], "0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "2.in_between",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "4.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.4", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.5", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.6", 7) => 7;

    // rename file while everything is open, this triggers both
    // a create and delete simultaneously
    lfs_rename(&lfs, "/1.move_me", "/3.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;

    // check that nothing was corrupted
    lfs_dir_t dir;
    struct lfs_info info;
    lfs_dir_open(&lfs, &dir, "/") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.in_between") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "3.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 0);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "4.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/0.before", LFS_O_RDONLY) => 0;
    uint8_t buffer[1024];
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.4") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/2.in_between", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.5") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/4.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.6") == 0);
    lfs_file_close(&lfs, &file) => 0;

    // now move back
    lfs_file_open(&lfs, &file, "/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "remove me",
            sizeof("remove me")) => sizeof("remove me");
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &files[0], "0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "2.in_between",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "4.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.7", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.8", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.9", 7) => 7;

    // rename file while everything is open, this triggers both
    // a create and delete simultaneously
    lfs_rename(&lfs, "/3.move_me", "/1.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;

    // and check that nothing was corrupted again
    lfs_dir_open(&lfs, &dir, "/") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "1.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 0);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.in_between") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "4.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/0.before", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.7") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/2.in_between", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.8") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/4.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.9") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;
'''

# create + delete in different dirs with neighbors
[cases.create_delete_different]
code = '''
    lfs_t lfs;
    lfs_format(&lfs, cfg) => 0;
    lfs_mount(&lfs, cfg) => 0;

    // littlefs keeps files sorted, so we know the order these will be in
    lfs_mkdir(&lfs, "/dir.1") => 0;
    lfs_mkdir(&lfs, "/dir.2") => 0;
    lfs_file_t file;
    lfs_file_open(&lfs, &file, "/dir.1/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.2/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "remove me",
            sizeof("remove me")) => sizeof("remove me");
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/dir.1/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.1", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.1/2.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.2", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/dir.2/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.3", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.2/2.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.4", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_t files[4];
    lfs_file_open(&lfs, &files[0], "/dir.1/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "/dir.1/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "/dir.2/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[3], "/dir.2/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.5", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.6", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.7", 7) => 7;
    lfs_file_write(&lfs, &files[3], "test.8", 7) => 7;

    // rename file while everything is open, this triggers both
    // a create and delete as it overwrites the destination file
    lfs_rename(&lfs, "/dir.1/1.move_me", "/dir.2/1.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;
    lfs_file_close(&lfs, &files[3]) => 0;

    // check that nothing was corrupted
    lfs_dir_t dir;
    struct lfs_info info;
    lfs_dir_open(&lfs, &dir, "/") => 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, "dir.1") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "dir.2") == 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, "/dir.1") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "/dir.2") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "1.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 0);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/dir.1/0.before", LFS_O_RDONLY) => 0;
    uint8_t buffer[1024];
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.5") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.1/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.6") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.2/0.before", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.7") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.2/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.8") == 0);
    lfs_file_close(&lfs, &file) => 0;

    // now move back
    lfs_file_open(&lfs, &file, "/dir.1/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "remove me",
            sizeof("remove me")) => sizeof("remove me");
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &files[0], "/dir.1/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "/dir.1/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "/dir.2/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[3], "/dir.2/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.9", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.a", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.b", 7) => 7;
    lfs_file_write(&lfs, &files[3], "test.c", 7) => 7;

    // rename file while everything is open, this triggers both
    // a create and delete simultaneously
    lfs_rename(&lfs, "/dir.2/1.move_me", "/dir.1/1.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;
    lfs_file_close(&lfs, &files[3]) => 0;

    // and check that nothing was corrupted again
    lfs_dir_open(&lfs, &dir, "/") => 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, "dir.1") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "dir.2") == 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, "/dir.1") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "1.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 0);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "/dir.2") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/dir.1/0.before", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.9") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.1/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.a") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.2/0.before", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.b") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/dir.2/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.c") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;
'''

# move fix in relocation
[cases.move_fix_relocation]
in = "lfs.c"
defines.RELOCATIONS = [0x0, 0x1, 0x2, 0x3]
defines.ERASE_CYCLES = 0xffffffff
code = '''
    lfs_t lfs;
    lfs_format(&lfs, cfg) => 0;
    lfs_mount(&lfs, cfg) => 0;

    lfs_mkdir(&lfs, "/parent") => 0;
    lfs_mkdir(&lfs, "/parent/child") => 0;

    lfs_file_t file;
    lfs_file_open(&lfs, &file, "/parent/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "move me",
            sizeof("move me")) => sizeof("move me");
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/parent/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.1", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/2.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.2", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.3", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/2.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.4", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_t files[4];
    lfs_file_open(&lfs, &files[0], "/parent/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "/parent/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "/parent/child/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[3], "/parent/child/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.5", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.6", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.7", 7) => 7;
    lfs_file_write(&lfs, &files[3], "test.8", 7) => 7;

    // force specific directories to relocate
    if (RELOCATIONS & 0x1) {
        lfs_dir_t dir;
        lfs_dir_open(&lfs, &dir, "/parent");
        lfs_testbd_setwear(cfg, dir.m.pair[0], 0xffffffff) => 0;
        lfs_testbd_setwear(cfg, dir.m.pair[1], 0xffffffff) => 0;
        lfs_dir_close(&lfs, &dir) => 0;
    }
    if (RELOCATIONS & 0x2) {
        lfs_dir_t dir;
        lfs_dir_open(&lfs, &dir, "/parent/child");
        lfs_testbd_setwear(cfg, dir.m.pair[0], 0xffffffff) => 0;
        lfs_testbd_setwear(cfg, dir.m.pair[1], 0xffffffff) => 0;
        lfs_dir_close(&lfs, &dir) => 0;
    }

    // ok, now we move the file, this creates a move that needs to be
    // fixed, possibly in a metadata-pair that needs to be relocated
    //
    // the worst case is if we need to relocate and we need to implicit
    // fix the move in our parent before it falls out of date
    lfs_rename(&lfs, "/parent/1.move_me", "/parent/child/1.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;
    lfs_file_close(&lfs, &files[3]) => 0;

    // check that nothing was corrupted
    lfs_dir_t dir;
    struct lfs_info info;
    lfs_dir_open(&lfs, &dir, "/parent") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "child") == 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, "/parent/child") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "1.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == sizeof("move me"));
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/parent/0.before", LFS_O_RDONLY) => 0;
    uint8_t buffer[1024];
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.5") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.6") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/0.before", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.7") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.8") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;
'''

# move fix in relocation with predecessor
[cases.move_fix_relocation_predecessor]
in = "lfs.c"
defines.RELOCATIONS = [0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7]
defines.ERASE_CYCLES = 0xffffffff
code = '''
    lfs_t lfs;
    lfs_format(&lfs, cfg) => 0;
    lfs_mount(&lfs, cfg) => 0;

    lfs_mkdir(&lfs, "/parent") => 0;
    lfs_mkdir(&lfs, "/parent/child") => 0;
    lfs_mkdir(&lfs, "/parent/sibling") => 0;

    lfs_file_t file;
    lfs_file_open(&lfs, &file, "/parent/sibling/1.move_me",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "move me",
            sizeof("move me")) => sizeof("move me");
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_open(&lfs, &file, "/parent/sibling/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.1", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/sibling/2.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.2", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/0.before",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.3", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/2.after",
            LFS_O_WRONLY | LFS_O_CREAT) => 0;
    lfs_file_write(&lfs, &file, "test.4", 7) => 7;
    lfs_file_close(&lfs, &file) => 0;

    lfs_file_t files[4];
    lfs_file_open(&lfs, &files[0], "/parent/sibling/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[1], "/parent/sibling/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[2], "/parent/child/0.before",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_open(&lfs, &files[3], "/parent/child/2.after",
            LFS_O_WRONLY | LFS_O_TRUNC) => 0;
    lfs_file_write(&lfs, &files[0], "test.5", 7) => 7;
    lfs_file_write(&lfs, &files[1], "test.6", 7) => 7;
    lfs_file_write(&lfs, &files[2], "test.7", 7) => 7;
    lfs_file_write(&lfs, &files[3], "test.8", 7) => 7;

    // force specific directories to relocate
    if (RELOCATIONS & 0x1) {
        lfs_dir_t dir;
        lfs_dir_open(&lfs, &dir, "/parent");
        lfs_testbd_setwear(cfg, dir.m.pair[0], 0xffffffff) => 0;
        lfs_testbd_setwear(cfg, dir.m.pair[1], 0xffffffff) => 0;
        lfs_dir_close(&lfs, &dir) => 0;
    }
    if (RELOCATIONS & 0x2) {
        lfs_dir_t dir;
        lfs_dir_open(&lfs, &dir, "/parent/sibling");
        lfs_testbd_setwear(cfg, dir.m.pair[0], 0xffffffff) => 0;
        lfs_testbd_setwear(cfg, dir.m.pair[1], 0xffffffff) => 0;
        lfs_dir_close(&lfs, &dir) => 0;
    }
    if (RELOCATIONS & 0x4) {
        lfs_dir_t dir;
        lfs_dir_open(&lfs, &dir, "/parent/child");
        lfs_testbd_setwear(cfg, dir.m.pair[0], 0xffffffff) => 0;
        lfs_testbd_setwear(cfg, dir.m.pair[1], 0xffffffff) => 0;
        lfs_dir_close(&lfs, &dir) => 0;
    }

    // ok, now we move the file, this creates a move that needs to be
    // fixed, possibly in a metadata-pair that needs to be relocated
    //
    // and now relocations can force us to need to fix our move in either
    // the parent or child before things break
    lfs_rename(&lfs,
            "/parent/sibling/1.move_me",
            "/parent/child/1.move_me") => 0;

    lfs_file_close(&lfs, &files[0]) => 0;
    lfs_file_close(&lfs, &files[1]) => 0;
    lfs_file_close(&lfs, &files[2]) => 0;
    lfs_file_close(&lfs, &files[3]) => 0;

    // check that nothing was corrupted
    lfs_dir_t dir;
    struct lfs_info info;
    lfs_dir_open(&lfs, &dir, "/parent") => 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, "child") == 0);
    assert(info.type == LFS_TYPE_DIR);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "sibling") == 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, "/parent/sibling") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_dir_open(&lfs, &dir, "/parent/child") => 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, "0.before") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "1.move_me") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == sizeof("move me"));
    lfs_dir_read(&lfs, &dir, &info) => 1;
    assert(strcmp(info.name, "2.after") == 0);
    assert(info.type == LFS_TYPE_REG);
    assert(info.size == 7);
    lfs_dir_read(&lfs, &dir, &info) => 0;
    lfs_dir_close(&lfs, &dir) => 0;

    lfs_file_open(&lfs, &file, "/parent/sibling/0.before", LFS_O_RDONLY) => 0;
    uint8_t buffer[1024];
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.5") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/sibling/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.6") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/0.before", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.7") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_file_open(&lfs, &file, "/parent/child/2.after", LFS_O_RDONLY) => 0;
    lfs_file_read(&lfs, &file, buffer, 7) => 7;
    assert(strcmp((char*)buffer, "test.8") == 0);
    lfs_file_close(&lfs, &file) => 0;
    lfs_unmount(&lfs) => 0;
'''