Deep Dive VS AssertJ

In OO you can make beautiful DSLs that allow really declarative use within that domain, e.g. test assertions in AssertJ, but everybody in the OO world is sensible enough to not try and claim OO as such being declarative. I guess they don't feel a need to try to prove the superiority of the paradigm.

AssertJ comes with a variety of assertions that can be chained together and are specific to the type of your "actual" variable.

At any rate it comes from a library called assertj.

While Hamcrest add some fluentidity to unit tests ä, I prefer the fluent assertions of AssertJ.

Here comes AssertJ. It's a simple library designed to improve your assertions. I would consider it essential for my testing needs. It provides a vast variety of assertions, state of the art error messages. Also, it improves code readability, it's super simple to understand what you want to assert.

It is also reminiscent of a feature of the AssertJ testing library.