Re: [R] Package testing

From: Duncan Murdoch <>
Date: Tue, 15 Jun 2010 13:25:24 -0400

Gábor Csárdi wrote:
> Dear all,
> I would like to write some tests for my R package, and the usual
> 'tests' directory seemed like a good solution, but there is something
> I cannot understand.
> It is possible to supply files with the expected output for
> the tests, which is great. But since the tests are not run with R
> --slave, the expected output needs to contain all the extra output
> from R, e.g. the startup message. The commands are echoed to the
> output, too.
> This makes it difficult to write proper tests, as they will
> necessarily fail on all but one R versions (the version number is
> always part of the output), and one would need to write the test
> programs twice, once in the normal .R file, and once in the
> file.
> Is there a way to work around these things? Or am I trying to use the
> 'tests' directory for something that was not intended?

The normal workflow is to write the tests as R files, and run them. Then manually check every line of the Rout, and when you're satisfied it's fine, save it as an file. After that R will only report changes to that file that occur after the header, so version numbering changes will be ignored, but changes that affect your output will not.

Duncan Murdoch mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Tue 15 Jun 2010 - 17:28:06 GMT

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