iotest

#!/usr/bin/env bash
main() {
  io_test_exit() {
    printf -- '%s' "${1}" >&2
    exit 1
  }
  is_long() {
    [[ $(wc -l < "${1}") -gt 1 || $(head -1 "${1}" | wc -m) -gt 15 ]]
  }
  assert() {
    declare input output expected status
    input="${stdin}"
    output="${1}"
    expected="${2}"
    if [[ -n "${stdin_file}" ]]; then
      iotest_folder_path="$(dirname "${IOTEST_FOLDER}")"
      is_long "${stdin_file}" \
        && printf -- "Input file: %s\n" "${stdin_file#"${iotest_folder_path}/"}" \
        || printf -- "Input: %s\n" "${input}"
    fi
    # shellcheck disable=SC2059
    printf -- "${3}\n" "${output}"
    # shellcheck disable=SC2059
    printf -- "${4}\n" "${expected}"
    printf -- 'Status: '
    status=1
    [[ "${output}" == "${expected}" ]] \
      && printf -- 'success' \
      && status=0 \
      || printf -- 'failed'
    printf -- "\n"
    return $status
  }
  assert_status() {
    assert "${1}" "$(< "${2}")" 'Status code: %s' 'Expected status code: %s'
  }
  assert_stdout() {
    assert "$(< "${1}")" "$(< "${2}")" 'Output: %s' 'Expected output: %s'
  }
  assert_stderr() {
    assert "$(< "${1}")" "$(< "${2}")" 'Error output: %s' 'Expected error output: %s'
  }
  io_test() {
    declare -r test_folder="${1}"
    # shellcheck disable=SC2155
    declare -r test_folder_name="$(basename "${test_folder}")"
    declare -r test_name="${2}"
    declare -r test_path="${test_folder}/${test_name}"
    declare cmd="${IOTEST_CMD}"
    echo "Test ${test_folder_name}/${test_name}"
    # add loop variables
    # shellcheck disable=SC2034
    declare -r FILE_PATH="${WORKING_DIR}/${test_folder#"${IOTEST_FOLDER}/"}"
    # TODO use optarg file
    declare out_file err_file status_code stdin stdin_file
    out_file="$(mktemp)"
    err_file="$(mktemp)"
    # run cmd once
    if [[ -f "${test_path}.stdin" ]]; then
      stdin="$(< "${test_path}.stdin")"
      stdin_file="${test_path}.stdin"
      eval "cat '${test_path}.stdin' | ${cmd} >'${out_file}' 2>'${err_file}'"
      status_code=$?
    else
      stdin=''
      stdin_file=''
      eval "${cmd} >'${out_file}' 2>'${err_file}'"
      status_code=$?
    fi
    declare retrun_code=0
    # test status code
    if [[ -f "${test_path}.sc" ]]; then
      assert_status "${status_code}" "${test_path}.sc" \
        || retrun_code=1
    fi
    # test stdout
    if [[ -f "${test_path}.stdout" ]]; then
      assert_stdout "${out_file}" "${test_path}.stdout" \
        || retrun_code=1
    fi
    # test stderr
    if [[ -f "${test_path}.stderr" ]]; then
      echo "Stderr diff"
      assert_stderr "${err_file}" "${test_path}.stderr" \
        || retrun_code=1
    fi
    [[ "${status_code}" == 0 ]] \
      || cat "${err_file}" >&2
    rm "${out_file}"
    rm "${err_file}"
    return ${retrun_code}
  }
  run() {
    # run iotests
    declare -i passed=0 count=0 local_passed local_count
    # search deepest folders only by -links 2 (folder with 2 hardlinks)
    if [[ -z "${IOTEST_SINGLE_NAME}" ]]; then
      while read -r -d '' folder; do
        local_passed=0
        local_count=0
        echo -e "%% file start ${folder#"${IOTEST_FOLDER}/"} %%"
        # shellcheck disable=SC2012
        for name in $(ls "${folder}/" | rev | cut -d. -f2- | rev | sort -u); do
          count+=1
          local_count+=1
          # io_test "${folder}" "${name}" > /dev/null \
          io_test "${folder}" "${name}" \
            && passed+=1 \
            && local_passed+=1
        done
        printf -- "%s IO tests: run %s, skipped 0, passed %s\n" "$(basename "${folder}")" \
          "${local_count}" "${local_passed}"
        echo -e "%% file end ${folder#"${IOTEST_FOLDER}/"} %%\n"
      done < <(find "${IOTEST_FOLDER}" -type d -links 2 -print0)
    else
      declare -r folder="${IOTEST_FOLDER}/${IOTEST_SINGLE_NAME}"
      count=1
      # shellcheck disable=SC2012
      for name in $(ls "${folder}/" | rev | cut -d. -f2- | rev | sort -u); do
        io_test "${folder}" "${name}" \
          && passed=1 \
          || passed=0
      done
    fi
    printf -- "Summary: run %s, skipped 0, passed %s\n" "${count}" "${passed}"
  }

  [[ -n "${1}" ]] \
    || io_test_exit "Missing iotest folder"
  [[ -n "${2}" ]] \
    || io_test_exit "Missing iotest cmd"
  declare -r IOTEST_FOLDER="${1#"${WORKING_DIR}/"}"
  declare -r IOTEST_CMD="${2}"
  declare -r IOTEST_SINGLE_NAME="${3:-}"
  run
}

main "$@"