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981e64f524179bf34bace0f0617dc3a0e3ddbf58
littlefs/tests/test_files.toml
T
Christopher Haster 981e64f524 Added more seek tests, fixed some annoying POSIX/etc subtleties 
What do you think a file's size becomes when you:

1. seek past the end of a file
2. call write with zero data!

POSIX/etc has this case explicitly mentioned, noting that zero-sized
writes should never update the file size.

This clashes with the assumption that file writes always update the file
position, but I suppose it makes a bit of practical sense if you want
zero-sized file writes to be idempotent.
2023-10-14 00:38:49 -05:00

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# Test basic file operations
after = ['test_dtree']
# test creation/deletion
[cases.test_files_create]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == 0);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == 0);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => 0;
// try reading
uint8_t rbuf[8192];
lfsr_file_read(&lfs, &file, rbuf, sizeof(rbuf)) => 0;
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# test we can write some data, should be inlined
[cases.test_files_hello]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
uint8_t wbuf[8192];
strcpy((char*)wbuf, "Hello World!");
lfs_size_t wsize = strlen((const char*)wbuf);
lfsr_file_write(&lfs, &file, wbuf, wsize) => wsize;
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => wsize;
// try reading
uint8_t rbuf[8192];
memset(rbuf, 0xaa, sizeof(rbuf));
lfsr_file_read(&lfs, &file, rbuf, sizeof(rbuf)) => wsize;
assert(memcmp(rbuf, wbuf, wsize) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# test we can rewrite a file
[cases.test_files_trunc]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
uint8_t wbuf[8192];
strcpy((char*)wbuf, "Oh no!");
lfs_size_t wsize = strlen((const char*)wbuf);
lfsr_file_write(&lfs, &file, wbuf, wsize) => wsize;
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// rewrite the file
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
strcpy((char*)wbuf, "Hello World!");
wsize = strlen((const char*)wbuf);
lfsr_file_write(&lfs, &file, wbuf, wsize) => wsize;
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => wsize;
// try reading
uint8_t rbuf[8192];
memset(rbuf, 0xaa, sizeof(rbuf));
lfsr_file_read(&lfs, &file, rbuf, sizeof(rbuf)) => wsize;
assert(memcmp(rbuf, wbuf, wsize) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# check for LFS_F_EXCL errors
[cases.test_files_excl]
defines.REMOUNT = [false, true]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
uint8_t wbuf[8192];
strcpy((char*)wbuf, "Hello World!");
lfs_size_t wsize = strlen((const char*)wbuf);
lfsr_file_write(&lfs, &file, wbuf, wsize) => wsize;
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// try to recreate file, this should error
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => wsize;
// try reading
uint8_t rbuf[8192];
memset(rbuf, 0xaa, sizeof(rbuf));
lfsr_file_read(&lfs, &file, rbuf, sizeof(rbuf)) => wsize;
assert(memcmp(rbuf, wbuf, wsize) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# a file is not a directory
[cases.test_files_file_not_dir]
defines.REMOUNT = [false, true]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
uint8_t wbuf[8192];
strcpy((char*)wbuf, "Hello World!");
lfs_size_t wsize = strlen((const char*)wbuf);
lfsr_file_write(&lfs, &file, wbuf, wsize) => wsize;
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// try to open our file as a directory
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "hello") => LFS_ERR_NOTDIR;
// try to create a directory on top of our file
lfsr_mkdir(&lfs, "hello") => LFS_ERR_EXIST;
// try to rename a directory onto our file
lfsr_mkdir(&lfs, "not_hello") => 0;
lfsr_rename(&lfs, "not_hello", "hello") => LFS_ERR_ISDIR;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
// and with dir read
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "not_hello") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => wsize;
// try reading
uint8_t rbuf[8192];
memset(rbuf, 0xaa, sizeof(rbuf));
lfsr_file_read(&lfs, &file, rbuf, sizeof(rbuf)) => wsize;
assert(memcmp(rbuf, wbuf, wsize) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# a directory is not a file
[cases.test_files_dir_not_file]
defines.REMOUNT = [false, true]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a directory
lfsr_mkdir(&lfs, "hello") => 0;
// try reading our directory as a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => LFS_ERR_ISDIR;
// try writing our directory as a file
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => LFS_ERR_ISDIR;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_TRUNC) => LFS_ERR_ISDIR;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => LFS_ERR_ISDIR;
// try rename a file on top of our directory
lfsr_file_open(&lfs, &file, "not_hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
uint8_t wbuf[8192];
strcpy((char*)wbuf, "Hello World!");
lfs_size_t wsize = strlen((const char*)wbuf);
lfsr_file_write(&lfs, &file, wbuf, wsize) => wsize;
lfsr_file_close(&lfs, &file) => 0;
lfsr_rename(&lfs, "not_hello", "hello") => LFS_ERR_ISDIR;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our dir with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_DIR);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "not_hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == wsize);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// did we corrupt our renaming file?
// try reading our file
lfsr_file_open(&lfs, &file, "not_hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => wsize;
// try reading
uint8_t rbuf[8192];
memset(rbuf, 0xaa, sizeof(rbuf));
lfsr_file_read(&lfs, &file, rbuf, sizeof(rbuf)) => wsize;
assert(memcmp(rbuf, wbuf, wsize) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# try writing larger files?
#
# at 2*CACHE_SIZE we need an inlined tree
# ? single block?
# at 2*BLOCK_SIZE we need a b-tree
#
[cases.test_files_more]
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
uint8_t wbuf[SIZE];
uint32_t prng = 42;
for (lfs_size_t i = 0; i < SIZE; i++) {
wbuf[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, wbuf, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
assert(memcmp(rbuf, wbuf, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# more complex writing patterns to inlined files
# write files incrementally
[cases.test_files_incr]
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.CHUNK = ['CACHE_SIZE/2', '4', '1']
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
uint8_t wbuf[SIZE];
uint32_t prng = 42;
for (lfs_size_t i = 0; i < SIZE; i++) {
wbuf[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
lfsr_file_write(&lfs, &file, &wbuf[i], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
// note the switch to append here
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_APPEND) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
assert(memcmp(rbuf, wbuf, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# overwrite files
[cases.test_files_overwrite]
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.CHUNK = ['CACHE_SIZE/2', '4', '1']
# bit 0 => first chunk
# bit 1 => middle chunk
# bit 2 => last chunk
defines.MASK = [0, 1, 2, 3, 4, 5, 6, 7]
# 0 => in-order
# 1 => reversed
defines.ORDER = [0, 1]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write first chunk?
if (MASK & 1) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
}
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write second chunk?
if (MASK & 2) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE/2-CHUNK/2+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE/2 - CHUNK/2, LFS_SEEK_SET)
=> SIZE/2 - CHUNK/2;
lfsr_file_write(&lfs, &file, &sim[SIZE/2-CHUNK/2], CHUNK) => CHUNK;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write third chunk?
if (MASK & 4) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
// does our file match our simulation?
assert(memcmp(rbuf, sim, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# similar to overwrite files, but without underlying data
[cases.test_files_holes]
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.CHUNK = ['CACHE_SIZE/2', '4', '1']
# bit 0 => first chunk
# bit 1 => middle chunk
# bit 2 => last chunk
defines.MASK = [0, 1, 2, 3, 4, 5, 6, 7]
# 0 => in-order
# 1 => reversed
defines.ORDER = [0] # TODO 1?
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
memset(sim, 0, SIZE);
// we may not write the entire file
lfs_off_t size
= (MASK & 0x4) ? SIZE
: (MASK & 0x2) ? SIZE/2 + (CHUNK+2-1)/2
: (MASK & 0x1) ? CHUNK
: 0;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write first chunk?
if (MASK & 1) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
}
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write second chunk?
if (MASK & 2) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE/2-CHUNK/2+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE/2 - CHUNK/2, LFS_SEEK_SET)
=> SIZE/2 - CHUNK/2;
lfsr_file_write(&lfs, &file, &sim[SIZE/2-CHUNK/2], CHUNK) => CHUNK;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write third chunk?
if (MASK & 4) {
if (ORDER == 0) {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[SIZE-CHUNK+i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-CHUNK, LFS_SEEK_SET) => SIZE-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-CHUNK], CHUNK) => CHUNK;
} else {
for (lfs_size_t i = 0; i < CHUNK; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfsr_file_write(&lfs, &file, &sim[0], CHUNK) => CHUNK;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# writing any data structure backwards always reveals issues
[cases.test_files_reversed_overwrite]
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.CHUNK = ['CACHE_SIZE/2', '4', '1']
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write to file incrementally and backwards
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t j = 0; j < CHUNK; j++) {
sim[SIZE-i-CHUNK+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-i-CHUNK, LFS_SEEK_SET) => SIZE-i-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-i-CHUNK], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
// does our file match our simulation?
assert(memcmp(rbuf, sim, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# writing any data structure backwards always reveals issues
[cases.test_files_reversed_holes]
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.CHUNK = ['CACHE_SIZE/2', '4', '1']
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
reentrant = true
code = '''
// format once per test
lfs_t lfs;
int err = lfsr_mount(&lfs, CFG);
if (err) {
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// create a file, truncating in case of powerloss
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = 42;
memset(sim, 0, SIZE);
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
// write to file incrementally and backwards
for (lfs_size_t i = 0; i < SIZE; i += CHUNK) {
for (lfs_size_t j = 0; j < CHUNK; j++) {
sim[SIZE-i-CHUNK+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_seek(&lfs, &file, SIZE-i-CHUNK, LFS_SEEK_SET) => SIZE-i-CHUNK;
lfsr_file_write(&lfs, &file, &sim[SIZE-i-CHUNK], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => SIZE;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => SIZE;
// does our file match our simulation?
assert(memcmp(rbuf, sim, SIZE) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# fuzz testing
[cases.test_files_fuzz_aligned]
defines.N = 100
defines.SEED = 'range(100)'
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.CHUNK = ['CACHE_SIZE/2', '4', '1']
defines.INIT = [false, true]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else {
memset(sim, 0, SIZE);
size = 0;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// choose a random chunk-aligned location
lfs_off_t off = (TEST_PRNG(&prng) % (SIZE/CHUNK)) * CHUNK;
// update sim
for (lfs_size_t j = 0; j < CHUNK; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
size = lfs_max32(size, off+CHUNK);
// update file
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfsr_file_write(&lfs, &file, &sim[off], CHUNK) => CHUNK;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# fuzz testing
[cases.test_files_fuzz_unaligned]
defines.N = 100
defines.SEED = 'range(100)'
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
# chunk is more an upper limit here
defines.CHUNK = ['CACHE_SIZE/2', '4']
defines.INIT = [false, true]
defines.SYNC = [false, true]
defines.REMOUNT = [false, true]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else {
memset(sim, 0, SIZE);
size = 0;
}
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// update sim
for (lfs_size_t j = 0; j < chunk; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
if (chunk != 0) {
size = lfs_max32(size, off+chunk);
}
// update file
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfsr_file_write(&lfs, &file, &sim[off], chunk) => chunk;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// remount?
if (REMOUNT) {
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
}
}
lfsr_file_close(&lfs, &file) => 0;
// remount?
if (REMOUNT) {
lfsr_unmount(&lfs) => 0;
lfsr_mount(&lfs, CFG) => 0;
}
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# more seek testing
[cases.test_files_r_seek]
defines.N = 100
defines.SEED = 'range(10)'
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
# chunk is more an upper limit here
defines.CHUNK = ['CACHE_SIZE/2', '4']
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
uint32_t prng = SEED;
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
lfsr_file_close(&lfs, &file) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
lfs_soff_t off_ = 0;
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_soff_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// test different seek methods
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, off-off_, LFS_SEEK_CUR) => off;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, off-SIZE, LFS_SEEK_END) => off;
}
// tell should always report the correct position
lfsr_file_tell(&lfs, &file) => off;
// read the file and assert we got the correct data
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, chunk) => chunk;
assert(memcmp(rbuf, &sim[off], chunk) == 0);
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + chunk;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + chunk;
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# this is pretty much the same as earlier fuzz testing, except we test
# different seek methods
[cases.test_files_w_seek]
defines.N = 100
defines.SEED = 'range(10)'
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
# chunk is more an upper limit here
defines.CHUNK = ['CACHE_SIZE/2', '4']
defines.INIT = [false, true]
defines.SYNC = [false, true]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else {
memset(sim, 0, SIZE);
size = 0;
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_WRONLY) => 0;
lfs_soff_t off_ = 0;
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// test different seek methods
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, off-off_, LFS_SEEK_CUR) => off;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, off-size, LFS_SEEK_END) => off;
}
// tell should always report the correct position
lfsr_file_tell(&lfs, &file) => off;
// update the sim
for (lfs_size_t j = 0; j < chunk; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
if (chunk != 0) {
size = lfs_max32(size, off+chunk);
}
// update the file
lfsr_file_write(&lfs, &file, &sim[off], chunk) => chunk;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + chunk;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + chunk;
}
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# the above was just warmup, here's the real seek test
[cases.test_files_rw_seek]
defines.N = 100
defines.SEED = 'range(100)'
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
# chunk is more an upper limit here
defines.CHUNK = ['CACHE_SIZE/2', '4']
defines.INIT = [false, true]
defines.SYNC = [false, true]
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = SEED;
if (INIT) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else {
memset(sim, 0, SIZE);
size = 0;
}
lfsr_file_close(&lfs, &file) => 0;
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDWR) => 0;
lfs_soff_t off_ = 0;
for (lfs_size_t i = 0; i < N; i++) {
// choose a random location
lfs_off_t off = TEST_PRNG(&prng) % SIZE;
// and a random size, up to the chunk size
lfs_size_t chunk = lfs_min32(
TEST_PRNG(&prng) % CHUNK,
SIZE - off);
// and if we are reading or writing
uint8_t op = TEST_PRNG(&prng) % 2;
// test different seek methods
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, off-off_, LFS_SEEK_CUR) => off;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, off-size, LFS_SEEK_END) => off;
}
// tell should always report the correct position
lfsr_file_tell(&lfs, &file) => off;
// writing?
if (op == 0) {
// update the sim
for (lfs_size_t j = 0; j < chunk; j++) {
sim[off+j] = 'a' + (TEST_PRNG(&prng) % 26);
}
if (chunk != 0) {
size = lfs_max32(size, off+chunk);
}
// update the file
lfsr_file_write(&lfs, &file, &sim[off], chunk) => chunk;
// sync?
if (SYNC) {
lfsr_file_sync(&lfs, &file) => 0;
}
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + chunk;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + chunk;
// reading?
} else if (op == 1) {
// we may read less than chunk if we're past eof
lfs_off_t expected = lfs_min32(
chunk,
size - lfs_min32(off, size));
// read the file and assert we got the correct data
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, chunk) => expected;
assert(memcmp(rbuf, &sim[off], expected) == 0);
// tell should report the new position
lfsr_file_tell(&lfs, &file) => off + expected;
// keep track of previous off for LFS_SEEK_CUR
off_ = off + expected;
}
}
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# test other corner conditions
[cases.test_files_seek_negative]
defines.WHENCE = ['LFS_SEEK_SET', 'LFS_SEEK_CUR', 'LFS_SEEK_END']
defines.SIZE = ['CACHE_SIZE/2', '2*CACHE_SIZE']
defines.INIT = [false, true]
defines.MODE = ['LFS_O_RDONLY', 'LFS_O_WRONLY', 'LFS_O_RDWR']
code = '''
lfs_t lfs;
lfsr_format(&lfs, CFG) => 0;
lfsr_mount(&lfs, CFG) => 0;
// create a file
lfsr_file_t file;
lfsr_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
// simulate our file in ram
uint8_t sim[SIZE];
lfs_off_t size;
uint32_t prng = 42;
if (INIT) {
for (lfs_size_t i = 0; i < SIZE; i++) {
sim[i] = 'a' + (TEST_PRNG(&prng) % 26);
}
lfsr_file_write(&lfs, &file, sim, SIZE) => SIZE;
size = SIZE;
} else {
memset(sim, 0, SIZE);
size = 0;
}
lfsr_file_close(&lfs, &file) => 0;
// try to seek before the beginning of the file, this should fail
lfsr_file_open(&lfs, &file, "hello", MODE) => 0;
if (WHENCE == LFS_SEEK_SET) {
lfsr_file_seek(&lfs, &file, -1, LFS_SEEK_SET) => LFS_ERR_INVAL;
} else if (WHENCE == LFS_SEEK_CUR) {
lfsr_file_seek(&lfs, &file, -1, LFS_SEEK_CUR) => LFS_ERR_INVAL;
} else if (WHENCE == LFS_SEEK_END) {
lfsr_file_seek(&lfs, &file, -(size+1), LFS_SEEK_END) => LFS_ERR_INVAL;
}
lfsr_file_close(&lfs, &file) => 0;
// check our file with stat
struct lfs_info info;
lfsr_stat(&lfs, "hello", &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
// and with dir read
lfsr_dir_t dir;
lfsr_dir_open(&lfs, &dir, "/") => 0;
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfsr_dir_read(&lfs, &dir, &info) => 0;
assert(strcmp(info.name, "hello") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == size);
lfsr_dir_read(&lfs, &dir, &info) => LFS_ERR_NOENT;
lfsr_dir_close(&lfs, &dir) => 0;
// try reading our file
lfsr_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
// is size correct?
lfsr_file_size(&lfs, &file) => size;
// try reading
uint8_t rbuf[2*SIZE];
memset(rbuf, 0xaa, 2*SIZE);
lfsr_file_read(&lfs, &file, rbuf, 2*SIZE) => size;
// does our file match our simulation?
assert(memcmp(rbuf, sim, size) == 0);
lfsr_file_close(&lfs, &file) => 0;
lfsr_unmount(&lfs) => 0;
'''
# TODO
# [cases.test_files_truncate] ?
# [cases.test_files_fruncate] ?
# [cases.test_files_no_hidden_data]
# [cases.test_files_rwtf_fuzz] ?
# [cases.test_files_push] ?
# [cases.test_files_pop] ?
# [cases.test_files_rwtfpp_fuzz] ?
# [cases.test_files_rm]
# [cases.test_files_mv]
# [cases.test_files_mvrm]
# [cases.test_files_rmed]
# [cases.test_files_mved]
# [cases.test_files_mvrmed]
# [cases.test_files_multi_readers]
# [cases.test_files_multi_readers_one_writer]
# [cases.test_files_multi_writers]
# [cases.test_files_multi_readers_multi_writers]
# [cases.test_files_many]
# [cases.test_files_interleaved]
# [cases.test_files_interleaved_fuzz]
# [cases.test_files_interleaved_fuzz_fuzz]
# [cases.test_files_dtree_fuzz]
# [cases.test_files_dtree_fuzz_fuzz]
#
#[cases.test_files_simple]
#code = '''
# lfs_t lfs;
# lfs_format(&lfs, cfg) => 0;
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_t file;
# lfs_file_open(&lfs, &file, "hello",
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
# lfs_size_t size = strlen("Hello World!")+1;
# uint8_t buffer[1024];
# strcpy((char*)buffer, "Hello World!");
# lfs_file_write(&lfs, &file, buffer, size) => size;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
# lfs_file_read(&lfs, &file, buffer, size) => size;
# assert(strcmp((char*)buffer, "Hello World!") == 0);
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_large]
#defines.SIZE = [32, 8192, 262144, 0, 7, 8193]
#defines.CHUNKSIZE = [31, 16, 33, 1, 1023]
#code = '''
# lfs_t lfs;
# lfs_format(&lfs, cfg) => 0;
#
# // write
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_t file;
# lfs_file_open(&lfs, &file, "avacado",
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
# uint32_t prng = 1;
# uint8_t buffer[1024];
# for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // read
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE;
# prng = 1;
# for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_rewrite]
#defines.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
#defines.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
#defines.CHUNKSIZE = [31, 16, 1]
#code = '''
# lfs_t lfs;
# lfs_format(&lfs, cfg) => 0;
#
# // write
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_t file;
# uint8_t buffer[1024];
# lfs_file_open(&lfs, &file, "avacado",
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
# uint32_t prng = 1;
# for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // read
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE1;
# prng = 1;
# for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // rewrite
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY) => 0;
# prng = 2;
# for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // read
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => lfs_max(SIZE1, SIZE2);
# prng = 2;
# for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# if (SIZE1 > SIZE2) {
# prng = 1;
# for (lfs_size_t b = 0; b < SIZE2; b++) {
# TEST_PRNG(&prng);
# }
# for (lfs_size_t i = SIZE2; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_append]
#defines.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
#defines.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
#defines.CHUNKSIZE = [31, 16, 1]
#code = '''
# lfs_t lfs;
# lfs_format(&lfs, cfg) => 0;
#
# // write
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_t file;
# uint8_t buffer[1024];
# lfs_file_open(&lfs, &file, "avacado",
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
# uint32_t prng = 1;
# for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // read
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE1;
# prng = 1;
# for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // append
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_APPEND) => 0;
# prng = 2;
# for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // read
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE1 + SIZE2;
# prng = 1;
# for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# prng = 2;
# for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_truncate]
#defines.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
#defines.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
#defines.CHUNKSIZE = [31, 16, 1]
#code = '''
# lfs_t lfs;
# lfs_format(&lfs, cfg) => 0;
#
# // write
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_t file;
# uint8_t buffer[1024];
# lfs_file_open(&lfs, &file, "avacado",
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
# uint32_t prng = 1;
# for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // read
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE1;
# prng = 1;
# for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // truncate
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_TRUNC) => 0;
# prng = 2;
# for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# // read
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE2;
# prng = 2;
# for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_reentrant_write]
#defines.SIZE = [32, 0, 7, 2049]
#defines.CHUNKSIZE = [31, 16, 65]
#reentrant = true
#code = '''
# lfs_t lfs;
# int err = lfs_mount(&lfs, cfg);
# if (err) {
# lfs_format(&lfs, cfg) => 0;
# lfs_mount(&lfs, cfg) => 0;
# }
#
# lfs_file_t file;
# uint8_t buffer[1024];
# err = lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY);
# assert(err == LFS_ERR_NOENT || err == 0);
# if (err == 0) {
# // can only be 0 (new file) or full size
# lfs_size_t size = lfs_file_size(&lfs, &file);
# assert(size == 0 || size == SIZE);
# lfs_file_close(&lfs, &file) => 0;
# }
#
# // write
# lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_CREAT) => 0;
# uint32_t prng = 1;
# for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# }
# lfs_file_close(&lfs, &file) => 0;
#
# // read
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE;
# prng = 1;
# for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_reentrant_write_sync]
#defines = [
# # append (O(n))
# {MODE='LFS_O_APPEND', SIZE=[32, 0, 7, 2049], CHUNKSIZE=[31, 16, 65]},
# # truncate (O(n^2))
# {MODE='LFS_O_TRUNC', SIZE=[32, 0, 7, 200], CHUNKSIZE=[31, 16, 65]},
# # rewrite (O(n^2))
# {MODE=0, SIZE=[32, 0, 7, 200], CHUNKSIZE=[31, 16, 65]},
#]
#reentrant = true
#code = '''
# lfs_t lfs;
# int err = lfs_mount(&lfs, cfg);
# if (err) {
# lfs_format(&lfs, cfg) => 0;
# lfs_mount(&lfs, cfg) => 0;
# }
#
# lfs_file_t file;
# uint8_t buffer[1024];
# err = lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY);
# assert(err == LFS_ERR_NOENT || err == 0);
# if (err == 0) {
# // with syncs we could be any size, but it at least must be valid data
# lfs_size_t size = lfs_file_size(&lfs, &file);
# assert(size <= SIZE);
# uint32_t prng = 1;
# for (lfs_size_t i = 0; i < size; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, size-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_close(&lfs, &file) => 0;
# }
#
# // write
# lfs_file_open(&lfs, &file, "avacado",
# LFS_O_WRONLY | LFS_O_CREAT | MODE) => 0;
# lfs_size_t size = lfs_file_size(&lfs, &file);
# assert(size <= SIZE);
# uint32_t prng = 1;
# lfs_size_t skip = (MODE == LFS_O_APPEND) ? size : 0;
# for (lfs_size_t b = 0; b < skip; b++) {
# TEST_PRNG(&prng);
# }
# for (lfs_size_t i = skip; i < SIZE; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
# for (lfs_size_t b = 0; b < chunk; b++) {
# buffer[b] = TEST_PRNG(&prng) & 0xff;
# }
# lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
# lfs_file_sync(&lfs, &file) => 0;
# }
# lfs_file_close(&lfs, &file) => 0;
#
# // read
# lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
# lfs_file_size(&lfs, &file) => SIZE;
# prng = 1;
# for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
# lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
# lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
# for (lfs_size_t b = 0; b < chunk; b++) {
# assert(buffer[b] == (TEST_PRNG(&prng) & 0xff));
# }
# }
# lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_many]
#defines.N = 300
#code = '''
# lfs_t lfs;
# lfs_format(&lfs, cfg) => 0;
# // create N files of 7 bytes
# lfs_mount(&lfs, cfg) => 0;
# for (int i = 0; i < N; i++) {
# lfs_file_t file;
# char path[1024];
# sprintf(path, "file_%03d", i);
# lfs_file_open(&lfs, &file, path,
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
# char wbuffer[1024];
# lfs_size_t size = 7;
# sprintf(wbuffer, "Hi %03d", i);
# lfs_file_write(&lfs, &file, wbuffer, size) => size;
# lfs_file_close(&lfs, &file) => 0;
#
# char rbuffer[1024];
# lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
# lfs_file_read(&lfs, &file, rbuffer, size) => size;
# assert(strcmp(rbuffer, wbuffer) == 0);
# lfs_file_close(&lfs, &file) => 0;
# }
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_many_power_cycle]
#defines.N = 300
#code = '''
# lfs_t lfs;
# lfs_format(&lfs, cfg) => 0;
# // create N files of 7 bytes
# lfs_mount(&lfs, cfg) => 0;
# for (int i = 0; i < N; i++) {
# lfs_file_t file;
# char path[1024];
# sprintf(path, "file_%03d", i);
# lfs_file_open(&lfs, &file, path,
# LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
# char wbuffer[1024];
# lfs_size_t size = 7;
# sprintf(wbuffer, "Hi %03d", i);
# lfs_file_write(&lfs, &file, wbuffer, size) => size;
# lfs_file_close(&lfs, &file) => 0;
# lfs_unmount(&lfs) => 0;
#
# char rbuffer[1024];
# lfs_mount(&lfs, cfg) => 0;
# lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
# lfs_file_read(&lfs, &file, rbuffer, size) => size;
# assert(strcmp(rbuffer, wbuffer) == 0);
# lfs_file_close(&lfs, &file) => 0;
# }
# lfs_unmount(&lfs) => 0;
#'''
#
#[cases.test_files_many_power_loss]
#defines.N = 300
#reentrant = true
#code = '''
# lfs_t lfs;
# int err = lfs_mount(&lfs, cfg);
# if (err) {
# lfs_format(&lfs, cfg) => 0;
# lfs_mount(&lfs, cfg) => 0;
# }
# // create N files of 7 bytes
# for (int i = 0; i < N; i++) {
# lfs_file_t file;
# char path[1024];
# sprintf(path, "file_%03d", i);
# err = lfs_file_open(&lfs, &file, path, LFS_O_WRONLY | LFS_O_CREAT);
# char wbuffer[1024];
# lfs_size_t size = 7;
# sprintf(wbuffer, "Hi %03d", i);
# if ((lfs_size_t)lfs_file_size(&lfs, &file) != size) {
# lfs_file_write(&lfs, &file, wbuffer, size) => size;
# }
# lfs_file_close(&lfs, &file) => 0;
#
# char rbuffer[1024];
# lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
# lfs_file_read(&lfs, &file, rbuffer, size) => size;
# assert(strcmp(rbuffer, wbuffer) == 0);
# lfs_file_close(&lfs, &file) => 0;
# }
# lfs_unmount(&lfs) => 0;
#'''
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