# Test the getopts builtin.

%prep

  test_getopts() {
    local OPTARG OPTIND opt
    local -a res
    while getopts abc: opt 2>&1; do
      [[ $opt == [?:] ]] || res+=( $opt )
    done
    (( $#res )) && print -r -- $res
    return $(( $#res ? 0 : 1 ))
  }

%test

  test_getopts
1:no arguments

  test_getopts foo
1:one operand

  test_getopts -a
0:one option
>a

  test_getopts -a foo
0:one option, one operand
>a

  test_getopts -a foo -b
0:one option, two operands, leading hyphen
>a

  test_getopts -ab
0:two options, single argument
>a b

  test_getopts -a -b
0:two options, separate arguments
>a b

  test_getopts -a -b +a
0:three options, + variant
>a b +a

  test_getopts -cx
0:one option with value, single argument
>c

  test_getopts +cx
0:one option with value, single argument, + variant
>+c

  test_getopts -c x
0:one option with value, separate arguments
>c

  test_getopts -acx
0:two options, one with value, single argument
>a c

  test_getopts -ac x
0:two options, one with value, separate arguments
>a c

  test_getopts -c
1:one option missing value
>test_getopts:3: argument expected after -c option

  test_getopts +c
1:one option missing value, + variant
>test_getopts:3: argument expected after +c option

  test_getopts -x
1:one illegal option
>test_getopts:3: bad option: -x

  test_getopts +x
1:one illegal option, + variant
>test_getopts:3: bad option: +x

  set -- -x
  OPTIND=1
  while getopts x: opt; do
    echo "$opt,${OPTARG:-Empty}"
  done
0:missing option-argument (error message mode)
>?,Empty
?(eval):3: argument expected after -x option

  set -- -x
  OPTIND=1
  while getopts :x: opt; do
    echo "$opt,${OPTARG:-Empty}"
  done
0:missing option-argument (quiet mode)
>:,x

  # This function is written so it can be easily referenced against other shells
  t() {
    local o i=0 n=$1
    shift
    while [ $i -lt $n ]; do
      i=$(( i + 1 ))
      getopts a: o "$@" 2> /dev/null
    done
    printf '<%d>' "$OPTIND"
  }
  # Try all these the native way, then the POSIX_BUILTINS way
  for 1 in no_posix_builtins posix_builtins; do (
    setopt $1
    print -rn - "$1: "
    t 1
    t 1 foo
    t 1 -- foo
    t 1 -a
    t 1 -b
    t 2 -a -b
    t 4 -a -b -c -d -a
    t 5 -a -b -c -a -b -c
    t 5 -a -b -c -d -ax -a
    print
  ); done
0:OPTIND calculation with and without POSIX_BUILTINS (workers/42248)
>no_posix_builtins: <1><1><2><1><1><3><5><7><6>
>posix_builtins: <1><1><2><2><2><3><6><7><7>