R Under development (unstable) (2024-05-17 r86565 ucrt) -- "Unsuffered Consequences"
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> source(file.path("_helper", "init.R"))
> 
> # - "Ensure we get warning if we try to run in handlers" -----------------------
> 
> try(unitize("_helper/unitizers/trivial.R"))

Warning in check_call_stack() :
  It appears you are running unitizer inside an error handling function such as 
`withCallingHanlders`, `tryCatch`, or `withRestarts`.  This is strongly dis-
couraged as it may cause unpredictable behavior from unitizer in the event tests
produce conditions / errors.  We strongly recommend you re-run your tests 
outside of such handling functions.
Warning in history_capt(history, interactive.mode) :
  Unable to capture history in non-interactive mode.
| 4/4 tests passed; nothing to review.

> tryCatch(unitize("_helper/unitizers/trivial.R"))

Warning in check_call_stack() :
  It appears you are running unitizer inside an error handling function such as 
`withCallingHanlders`, `tryCatch`, or `withRestarts`.  This is strongly dis-
couraged as it may cause unpredictable behavior from unitizer in the event tests
produce conditions / errors.  We strongly recommend you re-run your tests 
outside of such handling functions.
Warning in history_capt(history, interactive.mode) :
  Unable to capture history in non-interactive mode.
| 4/4 tests passed; nothing to review.

> withRestarts(unitize("_helper/unitizers/trivial.R"))

Warning in check_call_stack() :
  It appears you are running unitizer inside an error handling function such as 
`withCallingHanlders`, `tryCatch`, or `withRestarts`.  This is strongly dis-
couraged as it may cause unpredictable behavior from unitizer in the event tests
produce conditions / errors.  We strongly recommend you re-run your tests 
outside of such handling functions.
Warning in history_capt(history, interactive.mode) :
  Unable to capture history in non-interactive mode.
| 4/4 tests passed; nothing to review.

> 
> # need to figure out why running this without `try` in covr causes cover to
> # fail with
> # Error in aggregate.data.frame(mf[1L], mf[-1L], FUN = FUN, ...) :
> #   no rows to aggregate
> 
> # - "Ensure we get error if we try to do something stupid..." ------------------
> 
> try(
+   withRestarts(
+     unitize("_helper/unitizers/trivial.R"), 
+     unitizerInteractiveFail = function() NULL
+   )
+ )

Warning in check_call_stack() :
  It appears you are running unitizer inside an error handling function such as 
`withCallingHanlders`, `tryCatch`, or `withRestarts`.  This is strongly dis-
couraged as it may cause unpredictable behavior from unitizer in the event tests
produce conditions / errors.  We strongly recommend you re-run your tests 
outside of such handling functions.
Error in check_call_stack() : 
  "unitizerInteractiveFail" restart is already defined; unitizer relies on this 
restart to manage evaluation so unitizer will not run if it is defined outside 
of `unitize`.  If you did not define this restart contact maintainer.
> 
> 
> proc.time()
   user  system elapsed 
   1.12    0.12    1.21