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Does expression produce lifecycle warnings or errors?

Source: R/expect.R
expect_deprecated.Rd

These functions are equivalent to testthat::expect_warning() and testthat::expect_error() but check specifically for lifecycle warnings or errors.

To test whether a deprecated feature still works without causing a deprecation warning, set the lifecycle_verbosity option to "quiet".

test_that("feature still works", {
  withr::local_options(lifecycle_verbosity = "quiet")
  expect_true(my_deprecated_function())
})

Usage

expect_deprecated(expr, regexp = NULL, ...)

expect_defunct(expr)

Arguments

expr

Expression that should produce a lifecycle warning or error.

regexp

Optional regular expression matched against the expected warning message.

...

Arguments passed on to expect_match

fixed

If TRUE, treats regexp as a string to be matched exactly (not a regular expressions). Overrides perl.

perl

logical. Should Perl-compatible regexps be used?

Details

expect_deprecated() sets the lifecycle_verbosity option to "warning" to enforce deprecation warnings which are otherwise only shown once every 8 hours.