How to unit-test?

[Honza Břečka]

Hi,

I just want to know how do you unit-test that the following function, part of many node packages, returns expected result?

var http = require('http');

var https = require('https');

function getUrlLoader(url) {

  return url.indexOf('https') ? https : http;

}

Thanks!

[Aria Stewart]

Export it:

module.exports = getUrlLoader;

then try:

var test = require('tape');

var http = require('http');
var https = require('https');

var subject = require('./yourmodule');

test('check it out', function (t) {
t.equal(subject('https') == https);
t.equal(subject('http') == http);
t.end();
});


This exploits the fact that the return value from require is cached and consistent.

Also, just as a side note, please consider the url.parse method, rather than doing a naive indexOf on the URL for this purpose.

Aria

[Floby]

Aria got it right. Also on the fact that indexOf returns -1 when it does not match anything, your code doesn't work =) since -1 is truthy.