added Mocha Test

lib/holidays.js

 var holidayMapping = require('./holidayMapping.json');
+var easterSunday =require('./easterSunday');
 
 var fixedHolidays = {
   101: "0101",
@@ -23,44 +24,15 @@ var variableOffsets = {
   602: 50
 };
 
-var specificHolidays = getRegionSpecificHolidays(holidayMapping);
-console.log(holidayMapping.sureHolidays.concat(holidayMapping.specificHolidays).sort());
-
-function getRegionSpecificHolidays(holidayMapping) {
-  var data = holidayMapping["region"];
-  var ids = [];
-  for (var key in data) {
-    var obj = data[key];
-    for (var i = 0; i < obj.length; i++) {
-      if (ids.indexOf(obj[i]) < 0)
-        ids.push(obj[i]);
-    }
-  }
-  return ids.sort();
-}
-
-function sureHolidays() {
-  var holidays = [];
-  for (var key in fixedHolidays) {
-    if(specificHolidays.indexOf(key) < 0)
-      holidays.push(key);
-  }
-  for (var key in variableOffsets) {
-    if(specificHolidays.indexOf(key) < 0)
-      holidays.push(key);
-  }
-  return holidays;
-}
-
 function Holidays(year) {
 
   var easterSundays = {
-    2014: new Date(2014, 3, 20),
-    2015: new Date(2015, 3, 5),
-    2016: new Date(2016, 2, 27)
   };
 
   function getEasterSunday() {
+    if(!easterSundays[year])
+      easterSundays[year] = easterSunday.getEasterSunday(year);
+    console.log(easterSundays);
     return easterSundays[year];
   }