- Platform Configurator
- Getting Started with Selenium for Automated Website Testing
- Getting Started with Appium for Mobile Native Application Testing
- Selenium Bootcamp by Dave Haeffner
- Appium Bootcamp by Dave Haeffner and Matthew Edwards
There are many situations in which your test script may run ahead of the website or application you're testing, resulting in timeouts and a failing test. For example, you may have a dynamic content element that, after a user clicks on it, a loading appears for five seconds. If your script isn't written in such a way as to account for that five second load time, it may fail because the next interactive element isn't available yet.
The general advice from the Selenium community on how to handle this is to use explicit waits. While you could also use implicit waits, an implicit wait only waits for the appearance of certain elements on the page, while an explicit wait can be set to wait for broader conditions. Selenium guru Dave Haeffner provides an excellent example of why you should use explicit waits on his Elemental Selenium blog.
This code sample, from the SeleniumHQ documentation on explicit and implicit waits, shows how you would use an explicit wait in a Python test script. You can check out examples of using explicit waits in other languages in the code sections below it.