expect_values() not writting JSON snapshot

[mauromiguelm]

thanks for the work on shinytest2, the driver is very useful!

output of this line https://github.com/bigomics/omicsplayground/blob/f329f28a70831d0fa4553b8828bd2726fce2ad04/tests/testthat/test-board-values.R#L43 is:

masierom@MMMC:/mnt/c/code/omicsplayground$ Rscript -e "shiny::runTests()"
Loading required package: shiny
Loading required package: testthat
✔ | F W S  OK | Context
✔ |     1   0 | board-values [18.3s]                                                                                                                                                                       
⠏ |         0 | server                                                                                                                                                                                     
══ Results ════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
Duration: 18.3 s

── Skipped tests (1) ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
• On CRAN (1): test-board-values.R:17:3

[ FAIL 0 | WARN 0 | SKIP 1 | PASS 0 ]
Shiny App Test Results
* Success
  - ./tests/spelling.R
  - ./tests/testthat.R

Sys.info()

> Sys.info()
                             sysname                              release 
                             "Linux"  "5.10.16.3-microsoft-standard-WSL2" 
                             version                             nodename 
"#1 SMP Fri Apr 2 22:23:49 UTC 2021"                               "MMMC" 
                             machine                                login 
                            "x86_64"                            "unknown" 
                                user                       effective_user 
                          "masierom"                           "masierom" 

installed.packages()
installed-packages.csv