The obvious place to test any mobile site, you would think, would be on a mobile device. But, how many devices are we targeting for our site? Depending on the needs of the site, and its owner and users, there could be dozens of devices.
Note
Before deciding which devices to test your site for, it makes sense to find out which devices people are using to access it. Google Analytics (http://www.google.com/analytics/) provides a breakdown of visitors by device and shows what content they're accessing.
For a web app in particular, it's important to make sure the site works across as many devices as possible, as we want people to buy through that web app, and they won't buy if the app doesn't work for them.
So, what methods are available to us to test for different devices if we don't actually own all of them? The following methods are available to us:
Using a desktop browser with a resized window
Using a desktop browser with a mobile User Agent
Using a mobile testing website...