#! /bin/sh

# Test that the empty pattern matches everything.

# Some of these tests failed in grep 2.18.

. "${srcdir=.}/init.sh"; path_prepend_ ../src

fail=0

printf 'abc\n' >in || framework_failure_

nl='

'

for opt in '' -E -F; do

  case $opt in

    '') prefix='\(\)\1';;

    -E) prefix='()\1';;

    -F) prefix="foo$nl";;

  esac

  for pattern in "" "$nl" "---$nl" "${nl}foo"; do

    for pat in "$pattern" "$prefix$pattern"; do

      grep $opt -e "$pat" in >out || fail=1

      compare in out || fail=1

      printf -- '%s\n' "$pat" >pat || framework_failure_

      grep $opt -f pat in >out || fail=1

      compare in out || fail=1

      # Check that pattern files that end in non-newlines

      # are treated as if a newline were appended.

      case $pattern in

        '' | *"$nl") ;;

        *)

          printf -- '%s' "$pat" >pat || framework_failure_

          grep $opt -f pat in >out || fail=1

          compare in out || fail=1;;

      esac

    done

  done

done

Exit $fail