Nothing
test_that("negate works with both functions and vectors", {
true <- function(...) TRUE
expect_equal(negate(true)(), FALSE)
expect_equal(negate("x")(list(x = TRUE)), FALSE)
expect_equal(negate(is.null)(TRUE), TRUE)
expect_equal(negate(is.null)(NULL), FALSE)
})
test_that("negate() works with early returns", {
expect_false(negate(~ return(TRUE))())
})
test_that("negate() works with generic functions and local methods", {
is_foobar <- function(x) UseMethod("is_foobar")
local({
is_foobar.default <- function(x) TRUE
expect_false(negate(is_foobar)())
})
})
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