Created few test cases

test/json.sh

@@ -0,0 +1,105 @@
+# https://github.com/dominictarr/JSON.sh
+# Code is licensed under the MIT license
+# Copyright (c) 2011 Dominic Tarr
+
+throw () {
+  echo "$*" >&2
+  exit 1
+}
+
+tokenize () {
+  local ESCAPE='(\\[^u[:cntrl:]]|\\u[0-9a-fA-F]{4})'
+  local CHAR='[^[:cntrl:]"\\]'
+  local STRING="\"$CHAR*($ESCAPE$CHAR*)*\""
+  local NUMBER='-?(0|[1-9][0-9]*)([.][0-9]*)?([eE][+-]?[0-9]*)?'
+  local KEYWORD='null|false|true'
+  local SPACE='[[:space:]]+'
+  egrep -ao "$STRING|$NUMBER|$KEYWORD|$SPACE|." --color=never |
+    egrep -v "^$SPACE$"  # eat whitespace
+}
+
+parse_array () {
+  local index=0
+  local ary=''
+  read -r token
+  case "$token" in
+    ']') ;;
+    *)
+      while :
+      do
+        parse_value "$1" "$index"
+        let index=$index+1
+        ary="$ary""$value" 
+        read -r token
+        case "$token" in
+          ']') break ;;
+          ',') ary="$ary," ;;
+          *) throw "EXPECTED , or ] GOT ${token:-EOF}" ;;
+        esac
+        read -r token
+      done
+      ;;
+  esac
+  value=`printf '[%s]' $ary`
+}
+
+parse_object () {
+  local key
+  local obj=''
+  read -r token
+  case "$token" in
+    '}') ;;
+    *)
+      while :
+      do
+        case "$token" in
+          '"'*'"') key=$token ;;
+          *) throw "EXPECTED string GOT ${token:-EOF}" ;;
+        esac
+        read -r token
+        case "$token" in
+          ':') ;;
+          *) throw "EXPECTED : GOT ${token:-EOF}" ;;
+        esac
+        read -r token
+        parse_value "$1" "$key"
+        obj="$obj$key:$value"        
+        read -r token
+        case "$token" in
+          '}') break ;;
+          ',') obj="$obj," ;;
+          *) throw "EXPECTED , or } GOT ${token:-EOF}" ;;
+        esac
+        read -r token
+      done
+    ;;
+  esac
+  value=`printf '{%s}' "$obj"`
+}
+
+parse_value () {
+  local jpath="${1:+$1,}$2"
+  case "$token" in
+    '{') parse_object "$jpath" ;;
+    '[') parse_array  "$jpath" ;;
+    # At this point, the only valid single-character tokens are digits.
+    ''|[^0-9]) throw "EXPECTED value GOT ${token:-EOF}" ;;
+    *) value=$token ;;
+  esac
+  printf "[%s]\t%s\n" "$jpath" "$value"
+}
+
+parse () {
+  read -r token
+  parse_value
+  read -r token
+  case "$token" in
+    '') ;;
+    *) throw "EXPECTED EOF GOT $token" ;;
+  esac
+}
+
+if [ $0 = $BASH_SOURCE ];
+then
+  tokenize | parse
+fi