add simple automated test runner

*.actual.png

#!/bin/bash

signaltk img new --out ${TEST_OUTFILE} --width 200 --height 120 --clear '#ccc'

#!/bin/bash

set -u

echo_yellow () {

  printf "\033[1;33m%s\033[0m\n" "$1"

}

echo_green () {

  printf "\033[1;32m%s\033[0m\n" "$1"

}

echo_red () {

  printf "\033[1;31m%s\033[0m\n" "$1"

}

test_dir=$(dirname "$(readlink -f "$0")")

base_dir="${test_dir}/.."

num_total=0

num_passed=0

num_failed=0

echo "Running tests..."

for test_file in $(find $test_dir -mindepth 2 -name "test_*.sh"); do

  test_masterfile=${test_file/.sh/.png}

  test_outfile=${test_file/.sh/.actual.png}

  echo -n " + $(realpath --relative-to="${test_dir}" "${test_file}") "

  num_total=$[ $num_total + 1 ]

  (

      cd "$(dirname "${test_file}")" &&

      PATH="${base_dir}" \

      TEST_OUTFILE="${test_outfile}" \

      ${test_file}

  )

  pass="$?"

  if [[ $pass -eq 0 && ! -e "${test_masterfile}" ]]; then

    cp "${test_outfile}" "${test_masterfile}"

  fi

  # FIXME image diff

  if !(diff ${test_outfile} ${test_masterfile} &>/dev/null); then

    pass=1

  fi

  if [[ ${pass} -eq 0 ]]; then

    echo_green "PASS"

    num_passed=$[ $num_passed + 1 ]

  else

    echo_red "FAIL"

    num_failed=$[ $num_failed + 1 ]

  fi

done

echo

echo -n "Test Summary: "

if [[ ${num_passed} -eq ${num_total} && ${num_total} -gt 0 ]]; then

  echo_green "PASS (${num_passed}/${num_total})"

  exit 0

else

  echo_red "FAIL (${num_failed}/${num_total})"

  exit 1

fi