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What is it?

A package to extend tinytest, a lightweight, no-dependency, full-featured unit testing package, with diffobj which compares R objects with proper diff semantics.

So it tests and compares and, in case of differences, provides informative results.

What does that look like?

Glad you asked:

How do install it?

The package is now on CRAN and can be installed via a standard


Who wrote it?

Dirk Eddelbuettel and Alton Barbehenn

What license?

GPL (>= 2)

Thanks go to

Mark van der Loo for the excellent tinytest package, Brodie Gaslam for the nifty diffobj package and Michel Lang for checkmate.tinytest demonstrating the extensions mechanism.