arrayContains.sh

#!/usr/bin/env bash
set -e
#set -x
arrayContains(){
  ARRAY=($1);
  ITEM=$2;
  if echo "${ARRAY[*]}" | grep -E -q " $ITEM |^$ITEM | $ITEM\$"  ;
  then
    echo true;
  else
    echo false;
  fi;
}
#Test Cases
PASS=0
TEST_INDEX=1
if [ "$(arrayContains 'aaa bbb ccc ddd eee' abc)" == true ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  aaa)" == false ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  bbb)" == false ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  ccc)" == false ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  ddd)" == false ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  eee)" == false ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  fff)" == true ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  a)" == true ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  aa)" == true ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  ' eee')" == true ]; then echo "$TEST_INDEX faild"; ((PASS++));fi
(( TEST_INDEX++))
if [ "$(arrayContains 'aaa bbb ccc ddd eee'  'aaa ')" == true ]; then echo "$TEST_INDEX faild"; ((PASS++));fi

if [[ $PASS -gt 0 ]]; then
    echo "FAILD $PASS from $TEST_INDEX"
else
    echo "PASS all of $TEST_INDEX"
fi