There are two approaches to automated acceptance criteria or regression tests with Thucydides. Both involve implementing the tests as a sequence of very high-level steps, and then fleshing out those steps by drilling down into the details, until you get to the Page Objects. The difference involves the language used to implement the high-level tests. Tools like easyb are more focused on communication with non-developers, and allow high level tests to be expressed more easily in business terms. On the other hand, developers often find it more comfortable to work directly with JUnit, so if communication with non-technical stakeholders is not a high priority, this might be a preferred option.

In the current version of Thucydides, you can write your tests using easyb (for a more BDD-style approach) or in JUnit using Java or another JVM language (Groovy is a popular choice). Other BDD tools will be supported in future versions. We will discuss both here, but you can use whatever you and your team are more comfortable with.