Go TDD

tdd.sh

#!/usr/bin/env bash

PATTERN="${1}"

if [ "${PATTERN}" == "" ]; then
  PATTERN="*"
fi

DIR=`pwd`
LAST_HASH=""
LAST_FILE_LIST=""

function runIfChanged {
  FILE_LIST=`find . -type f -name "${PATTERN}" -not -path "*/.git/*" -not -path "*/go-*" -ls`
  NEW_HASH=`echo "$FILE_LIST" | md5`

  if [ "${NEW_HASH}" != "${LAST_HASH}" ]; then
    echo -e " \033[32mRunning tests...\033[0m"
    RESULT=$(go test $VERBOSEFLAG ./... 2>&1)
    clear
    echo -e "\033[32m$(date)\n$(date) Watching files under \033[33m${DIR}\033[32m matching pattern \033[33m${PATTERN}\033[0m"

    CHANGED_FILES=$(diff <(echo "$FILE_LIST") <(echo "$LAST_FILE_LIST") | grep ">" | awk -v OFS="\t" {'print $12'})
    CHANGED_COUNT=$(echo "$CHANGED_FILES" | wc -l)
    if [[ "$CHANGED_COUNT" -gt 1 ]]; then
      echo -e "\033[32m Changed: \033[33m$CHANGED_COUNT\033[32m files\033[0m"
    else
      echo -e "\033[32m Changed: \033[33m$CHANGED_FILES\033[0m"
    fi
    RESULT=$(echo "$RESULT" | sed 's/FAIL/\\033[31mFAIL\\033[0m/g')
    echo -e "$RESULT"

  fi
  LAST_HASH="${NEW_HASH}"
  LAST_FILE_LIST="${FILE_LIST}"
}

while true; do
  echo -e "\033[0;0H\033[32m$(date)\033[0m\033[2;0H"
  runIfChanged
  read -n 1 -t 1 -s input

  case "$input" in
  v)
    [ "$VERBOSEFLAG" == "-v" ] && VERBOSEFLAG="" || VERBOSEFLAG="-v"
    LAST_HASH=""
  ;;

  q)
    exit
  ;;

  esac
  input=""
done