Run regression tests in Chrome and Safari in addition to Firefox

[nschonni]

I do think there is value in testing Chrome and Safari -- we could catch browser bugs :) Browsers aren't perfect and we don't know what browser people will be looking at the example from.

Originally posted by @spectranaut in #1116 (comment)

[nschonni]

Might need to take another parameter to the test, or possibly sniff to see if the browser is installed

aria-practices/test/index.js

Lines 15 to 39 in ecdb87a

	if (!coverageReportRun) {
	test.before(async (t) => {
	geckodriver = await startGeckodriver(1022, 12 * 1000);
	session = new webdriver.Builder()
	.usingServer('http://localhost:' + geckodriver.port)
	.withCapabilities({
	'moz:firefoxOptions': {
	args: firefoxArgs
	}
	})
	.forBrowser('firefox')
	.build();
	await session;
	});
	test.beforeEach((t) => {
	t.context.session = session;
	t.context.waitTime = testWaitTime;
	});
	test.after.always(() => {
	return Promise.resolve(session && session.close())
	.then(() => geckodriver && geckodriver.stop());
	});
	}

Travis config is here:

• Chrome
• Safari

[nschonni]

Another alternate might be https://saucelabs.com/solutions/open-source since then IE11 could also be tested