tape js test

calc-test.js

var test = require('tape');

var calc = {
	add: function(x,y){
		return x+y*2
	}
}

test('adding two numbers', function (t) {
 	var r = calc.add(2,2, 'this should add 2+2 & return 4')
	t.equal(r, 4);
	t.end();
});