# e2fsprogs part 3 -- resize2fs grows and shrinks a volume in place; badblocks
# reads every block of it.
. "$BST_LIB"
require resize2fs e2fsprogs-resize/present

T=${TMPDIR:-/tmp}/bst-e2fsresize.$$
mkdir -p "$T" || exit 0
trap 'rm -rf "$T"' EXIT
IMG=$T/fs.img

sb()  { dumpe2fs -h "$IMG" 2>/dev/null | sed -n "s/^$1: *//p"; }
msg() { _i=$1; _n=$2; shift 2; _o=$("$@" 2>&1)
        case "$_o" in *"$_n"*) bst_ok "$_i" ;;
                      *) bst_notok "$_i" "want:'$_n' got:'$(_bst_1line "$_o")'" ;; esac; }

dd if=/dev/zero of="$IMG" bs=1024 count=8192 2>/dev/null
check    e2fsprogs-resize/mke2fs  mke2fs -q -F -t ext4 -b 1024 "$IMG"
check_eq e2fsprogs-resize/blocks-before "8192" "$(sb 'Block count')"

# resize2fs never extends the backing file, only the filesystem inside it, so the
# file is grown first and the two assertions are kept separate -- a resize2fs that
# silently did nothing would otherwise be hidden by the dd that did.
dd if=/dev/zero of="$IMG" bs=1024 seek=16383 count=1 conv=notrunc 2>/dev/null
check_eq e2fsprogs-resize/file-grown "16777216" "$(stat -c %s "$IMG")"
check    e2fsprogs-resize/grow    resize2fs "$IMG"
check_eq e2fsprogs-resize/blocks-after "16384" "$(sb 'Block count')"
check_rc e2fsprogs-resize/fsck-after-grow 0 e2fsck -f -n "$IMG"

e2fsck -f -y "$IMG" >/dev/null 2>&1
check    e2fsprogs-resize/shrink  resize2fs "$IMG" 8192
check_eq e2fsprogs-resize/blocks-after-shrink "8192" "$(sb 'Block count')"
check_rc e2fsprogs-resize/fsck-after-shrink 0 e2fsck -f -n "$IMG"
msg      e2fsprogs-resize/minimum "Estimated minimum size of the filesystem" resize2fs -P "$IMG"

# badblocks reads the whole volume; on a file backed by tmpfs there can be none,
# so an empty report is the pass and any output at all is a real finding.
if command -v badblocks >/dev/null 2>&1; then
  BB=$(badblocks "$IMG" 2>/dev/null)
  if [ -z "$BB" ]; then bst_ok e2fsprogs-resize/badblocks
  else bst_notok e2fsprogs-resize/badblocks "badblocks reported: $(_bst_1line "$BB")"; fi
else
  bst_skip e2fsprogs-resize/badblocks "badblocks not installed on this image"
fi