test_that("scalar true and false are vectorised", {
x <- c(TRUE, TRUE, FALSE, FALSE)
expect_equal(if_else(x, 1, 2), c(1, 1, 2, 2))
})
test_that("vector true and false are ok", {
x <- c(-1, 0, 1)
expect_equal(if_else(x < 0, x, 0), c(-1, 0, 0))
expect_equal(if_else(x > 0, x, 0), c(0, 0, 1))
})
test_that("missing values are missing", {
expect_equal(if_else(c(TRUE, NA, FALSE), -1, 1), c(-1, NA, 1))
})
test_that("works with lists", {
x <- list(1, 2, 3)
expect_equal(
if_else(c(TRUE, TRUE, FALSE), x, list(NULL)),
list(1, 2, NULL)
)
})
# Errors ------------------------------------------------------------------
test_that("if_else() give meaningful errors", {
expect_snapshot({
(expect_error(if_else(1:10, 1, 2)))
(expect_error(if_else(1:3 < 2, 1:2, 1:3)))
(expect_error(if_else(1:3 < 2, 1:3, 1:2)))
(expect_error(if_else(1:3 < 2, 1, 1L)))
x <- factor("x")
y <- ordered("x")
(expect_error(if_else(1:3 < 2, x, y)))
})
})
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