Automatic testing of software is brilliant. Saves a lot of time and effort, prevents problems soon and makes our products better. But when trying to automatically test accessibility we need to know about the challenges and problems before. Some tools may even produce wrong results and some tools may report everything is perfect when they can only test up to a third of criteria.
Some thoughts about accessibility of three-dimensional web user interfaces and what are our options to cover user needs. HTML canvas can be enriched with either sibling DOM or fall-back markup and if we think of single-dimensional interfaces then we can also make three-dimensional interfaces accessible.
This API is just an interface that assistive technologies and user agents use to communicate. It is important to know that there are differences between vendor solutions so testing is a bit more complex but crucial.
They say that sometimes you can not see the forest for the trees. But in web development you really should think about the forest of multiple trees to understand how it connects.