I'm currently reading Clean Code: A Handbook of Agile Software Craftsmanship
by 'Uncle Bob' Martin, which includes a section on writing readable
unit tests. I've had an article about using Domain Specific Languages (DSLs)
to write readable unit tests in the works for a while now, and was
inspired to finish it off using a 'clean' unit test
from the book.
You can read the article here.