R Under development (unstable) (2025-12-17 r89193 ucrt) -- "Unsuffered Consequences"
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> library(testit)
> test_pkg('testit')
assertion failed: this should produce an error
assertion failed: Frequentists must be correct (http://xkcd.com/1132/): the sun has exploded!
assertion failed: 1 equals integer(0)
1 (LHS) ==>
 num 1
----------
 int 1
<== (RHS) 1L 
Error in 1 + "a" : non-numeric argument to binary operator
> try(test_pkg('testit', 'test-error'))
Error from eval(exprs[i], envir) 
Error in eval(exprs[i], envir) : An intentional error!
> 
> proc.time()
   user  system elapsed 
   0.12    0.09    0.20