New book: Testing R Code

Table of contents Introduction Run-Time Testing with assertive Development-Time Testing with testthat Writing Easily Maintainable and Testable Code Integrating Testing into Packages Advanced Development-Time Testing Writing Your Own Assertions and Expectations 190 pages Price: $0.26 per page (Amazon)

I liked it at first sight when leafing through the pages. Will try to use this in my next R project.