#!/bin/bash

# Copyright 2013 Divya Kothari <divya.s.kothari@gmail.com>
# Copyright 2013 Robin Mittal <robinmittal.it@gmail.com>

[ -f testing.sh ] && . testing.sh

#testing "name" "command" "result" "infile" "stdin"

root_fs=`df | grep "\/$" | cut -d' ' -f1`
root_fs_type=`blkid -o value $root_fs | tail -1`

tmp_b_fs="tmp_b_fs"
tmp_b_fs_type="ext3"

reCreateTmpFs() {
  rm -rf $tmp_b_fs
  mknod $tmp_b_fs b 1 0
  mkfs.ext3 $tmp_b_fs >/dev/null 2>&1
}
reCreateTmpFs

# TODO: replace /mnt with a directory we know exists. (Android has no /mnt.)

testing "$root_fs /mnt" \
  "mount $root_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDir &&
   sleep 1 && umount /mnt && test -e /testDir && rmdir /testDir" "" "" ""
testing "$tmp_b_fs /mnt" \
  "mount $tmp_b_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDir &&
   sleep 1 && umount /mnt && ! test -e /mnt/testDir" "" "" ""
reCreateTmpFs

chmod 444 /mnt
testing "$root_fs /mnt (read_only dir)" \
  "mount $root_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDir &&
   sleep 1 && umount /mnt && test -e /testDir && rmdir /testDir" "" "" ""
testing "$tmp_b_fs /mnt (read_only dir)" \
  "mount $tmp_b_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDir &&
   sleep 1 && umount /mnt && ! test -e /mnt/testDir" "" "" ""
reCreateTmpFs
chmod 755 /mnt
testing "-w $root_fs /mnt (write_only mode)" \
  "mount -w $root_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDir &&
   sleep 1 && umount /mnt && test -e /testDir && rmdir /testDir" "" "" ""
testing "-w $tmp_b_fs /mnt (write_only mode)" \
  "mount -w $tmp_b_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDir &&
   sleep 1 && umount /mnt && ! test -e /mnt/testDir" "" "" ""
reCreateTmpFs
testing "-rw $tmp_b_fs /mnt (read_write mode)" \
  "mount -rw $tmp_b_fs /mnt >/dev/null && mkdir /mnt/testDir && \
   sleep 1 && ! test -e /mnt/testDir && umount /mnt" "" "" ""
reCreateTmpFs
testing "$tmp_b_fs /mnt -t fs_type" \
  "mount $tmp_b_fs /mnt -t $tmp_b_fs_type >/dev/null 2>&1 &&
   mkdir /mnt/testDir && sleep 1 && umount /mnt &&
   ! test -e /mnt/testDir" "" "" ""
reCreateTmpFs
mkdir -p testDir1/testDir2 testDir
echo "abcdefghijklmnopqrstuvwxyz" > testDir1/testDir2/testFile
testing "-o bind dir1 dir2" \
  'mount -o bind testDir1 testDir >/dev/null 2>&1 && \
   cat testDir/testDir2/testFile && sleep 1 && umount testDir' \
  "abcdefghijklmnopqrstuvwxyz\n" "" ""
testing "-o rbind dir1 dir2" \
  'mount -o rbind testDir1 testDir >/dev/null 2>&1 && \
   cat testDir/testDir2/testFile && sleep 1 && umount testDir' \
  "abcdefghijklmnopqrstuvwxyz\n" "" ""
testing "-o loop $tmp_b_fs /mnt" \
  "mount -o loop $tmp_b_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDirp &&
   sleep 1 && umount -d /mnt && ! test -e /mnt/testDirp" "" "" ""
reCreateTmpFs

mkdir testDir2
testing "-o move mount_1 mount_2" \
  "mount $tmp_b_fs testDir1 && mkdir testDir1/testDirr &&
   mount -o move testDir1 testDir2 && test -r testDir2/testDirr &&
   sleep 1 && umount testDir2" "" "" ""
reCreateTmpFs
testing "-o rw $tmp_b_fs /mnt" \
  "mount -o rw $tmp_b_fs /mnt >/dev/null 2>&1 && mkdir /mnt/testDir &&
   sleep 1 && umount /mnt && ! test -e /mnt/testDir" "" "" ""
reCreateTmpFs
testing "-o ro $tmp_b_fs /mnt" \
  "mount -o ro $tmp_b_fs /mnt >/dev/null 2>&1 &&
   mkdir /mnt/testDir 2>/dev/null || sleep 1 && umount /mnt" "" "" ""
reCreateTmpFs
testing "-o ro,remount $tmp_b_fs /mnt" \
  "mount -o ro $tmp_b_fs /mnt >/dev/null 2>&1 &&
   mkdir /mnt/testDir 2>/dev/null || sleep 1 && umount /mnt" "" "" ""
reCreateTmpFs

umount testDir1
rm -f $tmp_b_fs