This is my jasmine spec helper

specHelper.js

'use strict';
 
beforeEach(function() {
  this.addMatchers({
    toEqualData: function(expected) {
      this.message = function () {
        var notText = this.isNot ? " not" : "";
        return "Expected " + JSON.stringify(this.actual) + notText + " to be equals that " + JSON.stringify(expected);
      }
      return JSON.stringify(this.actual) === JSON.stringify(expected);
    },
    toHaveThisPattern : function(expected) {
    	this.message = function() {
    		var notText = this.isNot ? " not" : "";
    		return "Expected " + this.actual + notText + " to have this pattern " + expected;
    	}
    	return this.actual.test(expected);
    },
    toHaveBeenCalledToManyCalls : function(expected) {
    	this.message = function() {
    		var notText = this.isNot ? "not" : "";
    		return "Expected " + this.actual.callCount + notText + " but got " + expected;
    	}
    	return this.actual.callCount === expected;
    } 
  });
});