expect_success: Tools for testing expectations

In testthat: Unit Testing for R

Tools for testing expectations

Description

• expect_sucess() and expect_failure() check that there's at least one success or failure respectively.

• expect_snapshot_failure() records the failure message so that you can manually check that it is informative.

• expect_no_success() and expect_no_failure() check that are no successes or failures.

Use show_failure() in examples to print the failure message without throwing an error.

Usage

expect_success(expr)

expect_no_success(expr)

expect_failure(expr, message = NULL, ...)

expect_snapshot_failure(expr)

expect_no_failure(expr)

show_failure(expr)

Arguments

expr	Code to evalute
message	Check that the failure message matches this regexp.
...	Other arguments passed on to expect_match().

testthat documentation built on April 4, 2025, 1:08 a.m.