var assert = require('chai').assert;

 describe('Array', function() {

   describe('#indexOf()', function() {

     it('should return -1 when the value is not present', function() {

         var obj = {};

         var array  = [];

         var date = new Date();

         var fn = function() {

         }

         var _null = null;

         assert.equal('[object Object]', Object.prototype.toString.call(obj));

         assert.equal('[object Array]', Object.prototype.toString.call(array));

         assert.equal('[object Date]', Object.prototype.toString.call(date));

         assert.equal('[object Function]', Object.prototype.toString.call(fn));

         assert.equal('[object Null]', Object.prototype.toString.call(_null));

     });

   });

 });