Require usage of expect_null(x)
over expect_equal(x, NULL)
and similar
usages.
Details
testthat::expect_null()
exists specifically for testing for NULL
objects.
testthat::expect_equal()
, testthat::expect_identical()
, and
testthat::expect_true()
can also be used for such tests,
but it is better to use the tailored function instead.
See also
linters for a complete list of linters available in lintr.