Added a rudimentary test framework

Tests can be found in 'tests/test_blah.sh'
Tests can be run with 'make test'

tests/stats.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+
+import struct
+import sys
+import time
+import os
+import re
+
+def main():
+    with open('blocks/info') as file:
+        s = struct.unpack('<LLL4xQ', file.read())
+        print 'read_size: %d' % s[0]
+        print 'prog_size: %d' % s[1]
+        print 'erase_size: %d' % s[2]
+        print 'total_size: %d' % s[3]
+
+    print 'real_size: %d' % sum(
+        os.path.getsize(os.path.join('blocks', f))
+        for f in os.listdir('blocks') if re.match('\d+', f))
+
+    print 'runtime: %.3f' % (time.time() - os.stat('blocks').st_ctime)
+
+    with open('blocks/stats') as file:
+        s = struct.unpack('<QQQ', file.read())
+        print 'read_count: %d' % s[0]
+        print 'prog_count: %d' % s[1]
+        print 'erase_count: %d' % s[2]
+
+if __name__ == "__main__":
+    main(*sys.argv[1:])

tests/template.fmt

@@ -0,0 +1,45 @@
+/// AUTOGENERATED TEST ///
+#include "lfs.h"
+#include "emubd/lfs_emubd.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+// test stuff
+void test_log(const char *s, uintmax_t v) {{
+    printf("%s: %jd\n", s, v);
+}}
+
+void test_assert(const char *s, uintmax_t v, uintmax_t e) {{
+    test_log(s, v);
+    if (v != e) {{
+        printf("\033[31massert %s failed, expected %jd\033[0m\n", s, e);
+        exit(-2);
+    }}
+}}
+
+// lfs declarations
+lfs_t lfs;
+lfs_emubd_t bd;
+lfs_file_t file[4];
+lfs_dir_t dir[4];
+struct lfs_bd_info info;
+struct lfs_bd_stats stats;
+
+uint8_t buffer[1024];
+uint8_t wbuffer[1024];
+uint8_t rbuffer[1024];
+lfs_size_t size;
+lfs_size_t wsize;
+lfs_size_t rsize;
+
+uintmax_t res;
+
+
+int main() {{
+    lfs_emubd_create(&bd, "blocks");
+
+{tests}
+
+    lfs_emubd_destroy(&bd);
+}}

tests/test.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+import re
+import sys
+import subprocess
+import os
+
+def generate(test):
+    with open("tests/template.fmt") as file:
+        template = file.read()
+
+    lines = []
+
+    for line in test:
+        if '=>' in line:
+            test, expect = line.strip().strip(';').split('=>')
+            lines.append('res = {test};'.format(test=test.strip()))
+            lines.append('test_assert("{name}", res, {expect});'.format(
+                    name = re.match('\w*', test.strip()).group(),
+                    expect = expect.strip()))
+        else:
+            lines.append(line.strip())
+
+    with open('test.c', 'w') as file:
+        file.write(template.format(tests='\n'.join(4*' ' + l for l in lines)))
+
+def compile():
+    os.environ['DEBUG'] = '1'
+    os.environ['CFLAGS'] = '-Werror'
+    subprocess.check_call(['make', '--no-print-directory', '-s'], env=os.environ)
+
+def execute():
+    subprocess.check_call(["./lfs"])
+
+def main(test=None):
+    if test:
+        with open(test) as file:
+            generate(file)
+    else:
+        generate(sys.stdin)
+
+    compile()
+    execute()
+
+if __name__ == "__main__":
+    main(*sys.argv[1:])

tests/test_format.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+set -eu
+
+echo "=== Formatting tests ==="
+rm -rf blocks
+
+echo "--- Basic formatting ---"
+./tests/test.py << TEST
+    lfs_format(&lfs, &bd, &lfs_emubd_ops) => 0;
+TEST
+
+echo "--- Invalid superblocks ---"
+ln -f -s /dev/null blocks/0
+./tests/test.py << TEST
+    lfs_format(&lfs, &bd, &lfs_emubd_ops) => LFS_ERROR_CORRUPT;
+TEST
+rm blocks/0
+
+echo "--- Basic mounting ---"
+./tests/test.py << TEST
+    lfs_mount(&lfs, &bd, &lfs_emubd_ops) => 0;
+    lfs_unmount(&lfs) => 0;
+TEST
+
+echo "--- Invalid mount ---"
+./tests/test.py << TEST
+    lfs_format(&lfs, &bd, &lfs_emubd_ops) => 0;
+TEST
+rm blocks/0 blocks/1
+./tests/test.py << TEST
+    lfs_mount(&lfs, &bd, &lfs_emubd_ops) => LFS_ERROR_CORRUPT;
+TEST
+
+echo "--- Valid corrupt mount ---"
+./tests/test.py << TEST
+    lfs_format(&lfs, &bd, &lfs_emubd_ops) => 0;
+TEST
+rm blocks/0
+./tests/test.py << TEST
+    lfs_mount(&lfs, &bd, &lfs_emubd_ops) => 0;
+    lfs_unmount(&lfs) => 0;
+TEST
+
+echo "--- Results ---"
+./tests/stats.py