r-cran-testthat software package provides GNU R testsuite, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install r-cran-testthat
r-cran-testthat is installed in your system.
Make ensure the r-cran-testthat package were installed using the commands given below,
$ sudo dpkg-query -l | grep r-cran-testthat *
You will get with r-cran-testthat package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | GNU R |
| Package | r-cran-testthat |
| Version | 0.7.1-1 |
| Description | GNU R testsuite |
| Sub Section | Gnu-r |