O'Reilly Media book: Testing in Scala

Testing in Scala:
Testing in Scala starts with an introduction of the Scala programming language, explains why project infrastructure is critical, and provides compelling reasons to use Scala testing frameworks to not only test Scala code, but Java code too. This book introduces and explains the Simple Build Tool, the Scala answer to Ant, Maven, Gradle, and Buildr. It then explains in detail all the best tools for testing Scala and Java code today--ScalaTest, Specs2, ScalaCheck, and Borachio. Testing in Scala also gives insight on how to integrate coverage tools, continuous integration, web acceptance frameworks, and Java testing frameworks that you already know and love.