#! @builddir@/grub-shell-tester

echo one
foo=""
while test "$foo" != "1111"; do foo="${foo}1"; echo "$foo"; done

echo two
foo=""
while test "$foo" != "aaaa"
do
  foo="${foo}a"
  echo $foo
done

foo=""
until test "$foo" = "1111"; do foo="${foo}1"; echo $foo; done
foo=""
until test "$foo" = "aaaa"
do
  foo="${foo}a"
  echo $foo
done

# check "$?" in condition gets its value from while body commands
foo=""
false
while test "$?" != "0"
do
    echo $foo
    foo="${foo}1"
    test "$foo" = "111111"
done