Selenium how to select an object by class

Question

I have a web page with a form and has a field that uses the jquery autocomplete function.

This is how the HTML renders after a user name returns 1 or more results.

However I cannot figure out how to make Selenium "click" a result.

Can I do a jQuery type of selector. e.g.

$(".ul.ui-autocomplete li:first a")

Answer 1

You can try any of the options below: 

By Xpath:

 button[@type='submit']

button[@class='btn btn-success']

button[@type='submit'][@class='btn btn-success']

By CSS selector:

button[type='submit']

button[class='btn btn-success']

button[type='submit'][class='btn btn-success']