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I've been working with selenium a lot at work recently. There are lots of little nuances to grok if you want your tests to run completely deterministic: especially on a JavaScript-heavy site.

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I try to use explicit waits whenever possible. Luckily, the Java client library provides a rich set of combinators for declaring them.

You can also define your own; they are basically functions from a WebDriver object to some other thing (usually a Boolean).

http://seleniumhq.github.io/selenium/docs/api/java/org/openq...

Oh wow, Java gives you a lot! Python's are actually pretty decent as well, I just came to rely almost entirely on "presence_of_element_located" with our Javascript-heavy app.

Have you ever gotten completely deterministic tests? I'm starting to think it may not be possible.

Indeed, it is possible but requires some effort. Look at this project https://github.com/Skyscanner/pages. Choosing carefully your traits will do the trick.

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