Check if an R expression produces warnings or errors

The two functions has_warning() and has_error() check if an expression produces warnings and errors, respectively.

has_warning(expr)

has_error(expr, silent = !interactive())

Arguments

expr: an R expression
silent: logical: should the report of error messages be suppressed?

Value

A logical value.

Examples

has_warning(1 + 1)
#> [1] FALSE
has_warning(1:2 + 1:3)
#> [1] TRUE

has_error(2 - 3)
#> [1] FALSE
has_error(1 + "a")
#> [1] TRUE
has_error(stop("err"), silent = TRUE)
#> [1] TRUE