littlefs/tests/test_mtree.toml

# test a single supermdir
[cases.test_mtree_one_supermdir]
code = '''
    lfs_t lfs;
    lfsr_format(&lfs, cfg) => 0;
    lfsr_mount(&lfs, cfg) => 0;
    lfsr_unmount(&lfs) => 0;
'''

# test a single supermdir with a custom attribute
[cases.test_mtree_one_supermdir_attr]
in = 'lfs.c'
code = '''
    lfs_t lfs;
    lfsr_format(&lfs, cfg) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    lfsr_mdir_commit(&lfs, &lfs.supermdir, &(lfs_ssize_t){-1}, LFSR_ATTRS(
            LFSR_ATTR(-1, UATTR(1), 0, "ardvark", 7))) => 0;

    uint8_t buffer[7];
    lfsr_mdir_get(&lfs, &lfs.supermdir,
            -1, LFSR_TAG_UATTR(1), buffer, 7) => 7;
    assert(memcmp(buffer, "ardvark", 7) == 0);
    lfsr_unmount(&lfs) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    lfsr_mdir_get(&lfs, &lfs.supermdir,
            -1, LFSR_TAG_UATTR(1), buffer, 7) => 7;
    assert(memcmp(buffer, "ardvark", 7) == 0);
    lfsr_unmount(&lfs) => 0;
'''

# test a single supermdir with many commits
[cases.test_mtree_one_supermdir_many_commits]
defines.N = [5, 5000]
in = 'lfs.c'
code = '''
    const char *alphas = "abcdefghijklmnopqrstuvwxyz";
    lfs_t lfs;
    lfsr_format(&lfs, cfg) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    for (lfs_size_t i = 0; i < N; i++) {
        lfsr_mdir_commit(&lfs, &lfs.supermdir, &(lfs_ssize_t){-1}, LFSR_ATTRS(
                LFSR_ATTR(-1, UATTR(1), 0, &alphas[i % 26], 1))) => 0;

        uint8_t buffer[4];
        lfsr_mdir_get(&lfs, &lfs.supermdir,
                -1, LFSR_TAG_UATTR(1), buffer, 4) => 1;
        assert(memcmp(buffer, &alphas[i % 26], 1) == 0);
    }
    lfsr_unmount(&lfs) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    uint8_t buffer[4];
    lfsr_mdir_get(&lfs, &lfs.supermdir,
            -1, LFSR_TAG_UATTR(1), buffer, 4) => 1;
    assert(memcmp(buffer, &alphas[(N-1) % 26], 1) == 0);
    lfsr_unmount(&lfs) => 0;
'''

# TODO test many supermdirs

# try creating a range of entries that may or may not split our mtree
[cases.test_mtree_splitting]
defines.N = [5, 10, 20, 40, 80, 160, 320]
in = 'lfs.c'
code = '''
    const char *alphas = "abcdefghijklmnopqrstuvwxyz";
    lfs_t lfs;
    lfsr_format(&lfs, cfg) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    lfsr_mdir_t mdir;
    lfsr_mtree_lookup(&lfs, lfsr_mtree_weight(&lfs)-1, &mdir) => 0;

    lfs_ssize_t rid = 0;
    for (lfs_size_t i = 0; i < N; i++) {
        lfsr_mdir_commit(&lfs, &mdir, &rid, LFSR_ATTRS(
                LFSR_ATTR(rid, MKINLINED, +1, &alphas[i % 26], 1))) => 0;

        uint8_t buffer[4];
        lfsr_mdir_get(&lfs, &mdir, rid, LFSR_TAG_INLINED, buffer, 4) => 1;
        assert(memcmp(buffer, &alphas[i % 26], 1) == 0);

        rid += 1;
    }
    lfsr_unmount(&lfs) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    lfs_ssize_t mid = -1;
    rid = 0;
    mdir = lfs.supermdir;

    for (lfs_size_t i = 0; i < N; i++) {
        if (rid >= (lfs_ssize_t)mdir.rbyd.weight) {
            mid += 1;
            rid = 0;
            lfsr_mtree_lookup(&lfs, mid, &mdir) => 0;
        }

        uint8_t buffer[4];
        lfsr_mdir_get(&lfs, &mdir, rid, LFSR_TAG_INLINED, buffer, 4) => 1;
        assert(memcmp(buffer, &alphas[i % 26], 1) == 0);

        rid += 1;
    }
    lfsr_unmount(&lfs) => 0;
'''

# create a range of entries, and commit to the supermdir several times,
# this makes it more likely to force uninlining without necessarily
# splitting
[cases.test_mtree_uninlining]
defines.N = [5, 10, 20, 40, 80, 160, 320]
defines.M = [5, 5000]
in = 'lfs.c'
code = '''
    const char *alphas = "abcdefghijklmnopqrstuvwxyz";
    lfs_t lfs;
    lfsr_format(&lfs, cfg) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    lfsr_mdir_t mdir;
    lfsr_mtree_lookup(&lfs, lfsr_mtree_weight(&lfs)-1, &mdir) => 0;

    lfs_ssize_t rid = 0;
    for (lfs_size_t i = 0; i < N; i++) {
        lfsr_mdir_commit(&lfs, &mdir, &rid, LFSR_ATTRS(
                LFSR_ATTR(rid, MKINLINED, +1, &alphas[i % 26], 1))) => 0;

        uint8_t buffer[4];
        lfsr_mdir_get(&lfs, &mdir, rid, LFSR_TAG_INLINED, buffer, 4) => 1;
        assert(memcmp(buffer, &alphas[i % 26], 1) == 0);

        rid += 1;
    }

    for (lfs_size_t i = 0; i < M; i++) {
        lfsr_mdir_commit(&lfs, &lfs.supermdir, &(lfs_ssize_t){-1}, LFSR_ATTRS(
                LFSR_ATTR(-1, UATTR(1), 0, &alphas[i % 26], 1))) => 0;

        uint8_t buffer[4];
        lfsr_mdir_get(&lfs, &lfs.supermdir,
                -1, LFSR_TAG_UATTR(1), buffer, 4) => 1;
        assert(memcmp(buffer, &alphas[i % 26], 1) == 0);
    }
    lfsr_unmount(&lfs) => 0;

    lfsr_mount(&lfs, cfg) => 0;
    lfs_ssize_t mid = -1;
    rid = 0;
    mdir = lfs.supermdir;

    for (lfs_size_t i = 0; i < N; i++) {
        if (rid >= (lfs_ssize_t)mdir.rbyd.weight) {
            mid += 1;
            rid = 0;
            lfsr_mtree_lookup(&lfs, mid, &mdir) => 0;
        }

        uint8_t buffer[4];
        lfsr_mdir_get(&lfs, &mdir, rid, LFSR_TAG_INLINED, buffer, 4) => 1;
        assert(memcmp(buffer, &alphas[i % 26], 1) == 0);

        rid += 1;
    }

    uint8_t buffer[4];
    lfsr_mdir_get(&lfs, &lfs.supermdir,
            -1, LFSR_TAG_UATTR(1), buffer, 4) => 1;
    assert(memcmp(buffer, &alphas[(M-1) % 26], 1) == 0);
    lfsr_unmount(&lfs) => 0;
'''