error when testing a file using ```test``

[vermouthmjl]

Hi,
Something seems to have changed with 1.13.00.

> devtools::load_all(".")
Loading devtools
> test(filter ="bio")
Loading devtools
Loading required package: testthat
Testing devtools
  Error in grepl(filter, test_names, ...) : 
  unused arguments (load_helpers = FALSE, encoding = "UTF-8") 

> session_info()
Session info -----------------------------------------------------------------------
 setting  value                       
 version  R version 3.3.2 (2016-10-31)
 system   x86_64, darwin13.4.0        
 ui       RStudio (1.0.136)           
 language (EN)                        
 collate  C                           
 tz       Europe/Paris                
 date     2017-05-10                  

Packages ---------------------------------------------------------------------------
 package    * version date       source        
 base       * 3.3.2   2016-10-31 local         
 commonmark   1.2     2017-03-01 CRAN (R 3.3.2)
 crayon       1.3.2   2016-06-28 CRAN (R 3.3.0)
 datasets   * 3.3.2   2016-10-31 local         
 devtools   * 1.13.0  2017-05-08 CRAN          
 digest       0.6.12  2017-01-27 CRAN (R 3.3.2)
 git2r        0.18.0  2017-01-01 CRAN (R 3.3.2)
 graphics   * 3.3.2   2016-10-31 local         
 grDevices  * 3.3.2   2016-10-31 local         
 httr         1.2.1   2016-07-03 CRAN (R 3.3.0)
 jsonlite     1.4     2017-04-08 CRAN (R 3.3.2)
 magrittr     1.5     2014-11-22 CRAN (R 3.3.0)
 memoise      1.1.0   2017-04-21 CRAN (R 3.3.2)
 methods    * 3.3.2   2016-10-31 local         
 R6           2.2.0   2016-10-05 CRAN (R 3.3.0)
 Rcpp         0.12.10 2017-03-19 CRAN (R 3.3.2)
 roxygen2     6.0.1   2017-02-06 CRAN (R 3.3.2)
 rstudioapi   0.6     2016-06-27 CRAN (R 3.3.0)
 stats      * 3.3.2   2016-10-31 local         
 stringi      1.1.5   2017-04-07 CRAN (R 3.3.2)
 stringr      1.2.0   2017-02-18 CRAN (R 3.3.2)
 testthat   * 1.0.2   2016-04-23 CRAN (R 3.3.0)
 tools        3.3.2   2016-10-31 local         
 utils      * 3.3.2   2016-10-31 local         
 whisker      0.3-2   2013-04-28 CRAN (R 3.3.0)
 withr        1.0.2   2016-06-20 CRAN (R 3.3.0)
 xml2         1.1.1   2017-01-24 CRAN (R 3.3.2)

[vermouthmjl]

From what I can see, it seems there isn't really need to have load_helpers here
(c323994 588dd97), since it's already in r-lib/testthat@326a52c, at least for using test(). However, I don't know if these changes affect other things.

[jimhester]

The short term solution is to install devel testthat, this functionality inadvertently depends on changes in testthat that are not yet released to CRAN.

devtools::install_github("hadley/testthat")

[vermouthmjl]

OK, great. Thank you.
(I was trying to use install_version to install an older version of devtools, and that does not seem to work, but I guess that's normal.)

[lock]

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