expect_not

What it does

Checks for usage of expect_true(!x) and expect_false(!x) in tests.

Using expect_false(x) is clearer and more direct than expect_true(!x), and vice versa.

This rule is disabled by default. Select it either with the rule name "expect_not" or with the rule group "TESTTHAT".

expect_true(!x)
expect_false(!foo(x))
expect_true(!(x && y))

# rlang "!!!" operator is left unmodified
expect_true(!!!x)

Use instead:

expect_false(x)
expect_true(foo(x))
expect_false(x && y)

# rlang "!!!" operator is left unmodified
expect_true(!!!x)