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new behavior of suppressing messages and warnings in tests is wrong #254

kforner opened this Issue May 6, 2015 · 3 comments


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kforner commented May 6, 2015


  1. warnings can be very useful to detect bugs in the tests and in the code to be tested
    If you want to get rid of some (once you understand them, just suppress them using suppressMessages or suppressWarnings, or better test them using expect_warning

  2. now it is impossible to test code that deals with warnings. For instance suppose that you want to test a function that turns warnings into errors using the warn=2 option, it does no longer work in testthat tests.

  3. code does not behave like in the real R world.

just my opinion.


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hadley commented Sep 24, 2015

Hmmm, I think that ignoring messages is the right thing to do (in the same way printed output is ignored), but ignoring warnings might be too much.


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kforner commented Sep 24, 2015


@hadley hadley modified the milestone: 0.11.0 Sep 29, 2015

@hadley hadley closed this in 6403639 Sep 29, 2015


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kforner commented Sep 29, 2015

great !

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