test.sh

#!/usr/bin/env bash
set -euo pipefail
export LC_ALL=C

pass=0
fail=0

run() {
  local name="$1"
  shift

  if "$@"; then
    printf 'ok - %s\n' "$name"
    pass=$((pass + 1))
  else
    printf 'not ok - %s\n' "$name"
    fail=$((fail + 1))
  fi
}

check_line() {
  local input="$1"
  local needle="$2"

  printf '%s\n' "$input" | ./andsh | grep -Fqx "$needle"
}

# build from a clean tree
run "build" sh -c 'make clean >/dev/null && make >/dev/null'

# simple external command
run "echo" check_line "echo hi
exit" "hi"

# cd into /
run "cd" check_line "cd /
pwd
exit" "/"

# bare cd should land in $HOME
run "cd home" check_line "cd /
cd
pwd
exit" "$HOME"

# expand a basic env var
run "env var" check_line "echo \$HOME
exit" "$HOME"

# $? should reflect the last command
run "last status" check_line "nosuchcommand
echo \$?
exit" "127"

# a small three-stage pipe
run "pipe" check_line "printf abc | tr a-z A-Z | rev
exit" "CBA"

# tab-complete a PATH command
run "completion" expect -c '
  log_user 0
  spawn ./andsh
  expect "andsh$ "
  send "unam\t"
  expect {
    "uname " { exit 0 }
    timeout { exit 1 }
  }
'

# ctrl-d should exit cleanly
run "ctrl-d exits" expect -c '
  log_user 0
  spawn ./andsh
  expect "andsh$ "
  send "\004"
  expect eof
'

# up-arrow should replay history
run "history" expect -c '
  log_user 0
  spawn ./andsh
  expect "andsh$ "
  send "echo hi\r"
  expect "hi"
  expect "andsh$ "
  send "\033\[A\r"
  expect "hi"
  expect "andsh$ "
'

# cursor movement should let me fix a typo inline
run "left right" expect -c '
  log_user 0
  spawn ./andsh
  expect "andsh$ "
  send "echo ac\033\[Db\r"
  expect "abc"
  expect "andsh$ "
'

printf '\n%s passed, %s failed\n' "$pass" "$fail"
test "$fail" -eq 0