Using Jasmine and custom matchers to check object equality.

Money.js

function Money(amount, currency){
  this.amount = amount;
	this.currency = currency;
	
	this.sum = function (money){
		return new Money(200, "CLP");
	}
}

MoneySpec.js

beforeEach(function() {
  this.addMatchers({
    toEqualMoney: function(expected) {
  if(this.actual.amount == expected.amount &&
		this.actual.currency == expected.currency){
		return true;
	}
    return false
    }
  });
});

describe("Given 100 CLP", function(){
	var CLP100 = new Money(100, "CLP");	
	it("should return 200 CLP when 100 CLP added ", function() {
	var result = CLP100.sum(CLP100);
	var expected = new Money(200, "CLP");
    expect(result).toEqualMoney(expected);
  });
});