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Evaluate an expression multiple times until it succeeds

Source: R/try-again.R
try_again.Rd

If you have a flaky test, you can use try_again() to run it a few times until it succeeds. In most cases, you are better fixing the underlying cause of the flakeyness, but sometimes that's not possible.

Usage

try_again(times, code)

Arguments

times

Number of times to retry.

code

Code to evaluate.

Examples

usually_return_1 <- function(i) {
  if (runif(1) < 0.1) 0 else 1
}

if (FALSE) { # \dontrun{
# 10% chance of failure:
expect_equal(usually_return_1(), 1)

# 1% chance of failure:
try_again(3, expect_equal(usually_return_1(), 1))
} # }