checkWarning | R Documentation |
checkWarning
checks if a warning is generated by an expression, and
optionally follows an expected regular expression pattern.
checkWarning(expr, expected = TRUE, msg = NULL)
expr |
an R expression |
expected |
expected value as regular expression pattern. If a logical, then it specifies if a warning is expected or not. For backward compatibility, a |
msg |
informative message to add to the error in case of failure |
checkWarning
returns TRUE is the check is successful.
# check warnings
checkWarning({ warning('ah ah'); 3})
checkWarning({ warning('ah oh ah'); 3}, 'oh')
try( checkWarning(3) )
try( checkWarning({ warning('ah ah'); 3}, 'warn you') )
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