name: "Builtins: echo"
cases:
  - name: "echo with only --"
    stdin: echo --

  - name: "echo with -- and args"
    stdin: echo -- -1 --"aaa" ?^1as-

  - name: "echo -e"
    stdin: |
      echo -e "1. \x65" | hexdump -C
      echo -e "2. \x{65}" | hexdump -C

  - name: "echo options after an operand are operands"
    stdin: |
      echo hi -n
      echo a -e 'x\ty'
      echo -e a -n
      f() { echo "$@"; }
      f a -n

  - name: "echo with repeated options"
    stdin: |
      echo -n -n a; echo " rc=$?"
      echo -nn b; echo " rc=$?"
      echo -e -e 'c\td'
      echo -n -e -n 'e\tf'; echo

  - name: "echo uses the last of -e and -E"
    stdin: |
      echo -e -E 'a\tb'
      echo -E -e 'c\td'
      echo -eE 'e\tf'
      echo -Ee 'g\th'

  - name: "echo words that are not options"
    stdin: |
      echo - a
      echo -nx b
      echo -n -x c
      echo -e -- 'd\te'
      echo -n

  - name: "echo interprets escapes with xpg_echo"
    known_failure: true # TODO(echo): xpg_echo is not implemented
    stdin: |
      shopt -s xpg_echo
      echo 'a\tb'
      echo -E 'c\td'

  - name: "echo takes no options in POSIX mode with xpg_echo"
    known_failure: true # TODO(echo): xpg_echo is not implemented
    stdin: |
      set -o posix
      shopt -s xpg_echo
      echo -n 'a\tb'
      echo -e 'c'

  - name: "echo takes --help, -h and a word of unknown letters as operands"
    stdin: |
      echo --help
      echo -h
      echo -enx 'a\tb'
      echo -n -- a; echo
      echo -- -n