is_error: Check if an expression returns an error
In jknappe/ubzutils: Provides utility functions for working at UFZ-UBZ

Description Usage Arguments Details Value Author(s) See Also Examples

View source: R/helper_functions.R

Does a given expression return an error?

1	is_error(expr, tell = FALSE, force = FALSE)

`expr`	Expression to be tested for returning an error
`tell`	Logical: Should the error message be printed via `message`? DEFAULT: FALSE
`force`	Logical: Should an error be returned if the expression is not an error? DEFAULT: FALSE

Useful for tests where you want to make sure your function throws an error. This function was imported from the berryFunctions package.

TRUE/FALSE

Berry Boessenkool, berry-b@gmx.de, May 2016

stop, try, inherits

Other helper functions: key_valid()

is_error(  log(3)              )
is_error(  log("a")            )
is_error(  log(3),   tell=TRUE )
is_error(  log("a"), tell=TRUE )
stopifnot( is_error( log("a")  )  ) # or shorter:
is_error(  log("a"), force=TRUE)
# is_error(  log(3),   force=TRUE)
stopifnot(is_error(  is_error(log(3), force=TRUE)  ))