/*
 * Checks that the links in the navbar on the homepage have the right URLs to redirect to
 *
 * Test cases: https://github.com/LLK/scratch-www/wiki/Most-Important-Workflows#Create_should_take_you_to_the_editor
 */

var tap=require('tap');
var seleniumWebdriver = require('selenium-webdriver');

//chrome driver
var driver = new seleniumWebdriver.Builder().withCapabilities(seleniumWebdriver.Capabilities.chrome()).build();
//open scratch.ly in a new instance of the browser
driver.get('https://scratch.ly');

//return only the part of the URL that is in the href in the page's html,
//and the index that the href was found at
function getHrefFromUrl(url, expectedHref) {
	var hrefOnly = "";
	var hrefIndex = url.lastIndexOf(expectedHref);
	if (hrefIndex != -1) {
        var hrefOnly = url.substr(hrefIndex);
	};
    return {hrefIndex: hrefIndex,
            hrefOnly: hrefOnly};
};

//find the create link within the navbar
//the create link depends on whether the user is signed in or not (tips window opens)
tap.test('checkCreateLinkWhenSignedOut', function (t) {
    var xPathLink = '//li[contains(@class, "link") and contains(@class, "create")]/a';
    var createLinkSignedOut = driver.findElement(seleniumWebdriver.By.xpath(xPathLink));
    createLinkSignedOut.getAttribute('href').then( function (url) {
    	//expected value of the href
    	var expectedHref = '/projects/editor/?tip_bar=home';
    	var hrefInfo = getHrefFromUrl(url, expectedHref);
    	var hrefIndex = hrefInfo.hrefIndex;
    	var hrefOnly = hrefInfo.hrefOnly;
    	//the create href should match `/projects/editor/?tip_bar=home`
        t.equal(expectedHref, hrefOnly);
        //the create href should be at the end of the URL
        var urlLength = url.length;
        var urlLengthFromHrefInfo = hrefOnly.length + hrefIndex;
        t.equal(urlLengthFromHrefInfo, urlLength)
        t.end();
    });
});
 

// close the instance of the browser
driver.quit();