Testing R Code  book cover
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1st Edition

Testing R Code





ISBN 9780367782375
Published March 31, 2021 by Chapman and Hall/CRC
196 Pages

 
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Book Description

Learn how to write R code with fewer bugs.



The problem with programming is that you are always one typo away from writing something silly. Likewise with data analysis, a small mistake in your model can lead to a big mistake in your results. Combining the two disciplines means that it is all too easy for a missed minus sign to generate a false prediction that you don’t spot until it’s too late. Testing is the only way to be sure that your code, and your results, are correct.



Testing R Code teaches you how to perform development-time testing using the testthat package, allowing you to ensure that your code works as intended. The book also teaches run-time testing using the assertive package; enabling your users to correctly run your code.



After beginning with an introduction to testing in R, the book explores more advanced cases such as integrating tests into R packages; testing code that accesses databases; testing C++ code with Rcpp; and testing graphics. Each topic is explained with real-world examples, and has accompanying exercises for readers to practise their skills — only a small amount of experience with R is needed to get started!



 

Table of Contents

Introduction



Run-time testing with assertive



Development-time testing with testthat



Writing easily maintainable and testable code



Integrating testing into your packages



Writing your own assertions and expectations



Answers to exercises

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Author(s)

Biography

Richard Cotton