context("if_else")
test_that("first argument must be logical", {
expect_error(
if_else(1:10, 1, 2),
"`condition` must be a logical, not integer",
fixed = TRUE
)
})
test_that("true and false must be same length as condition (or length 1)", {
expect_error(
if_else(1:3 < 2, 1:2, 1:3),
"`true` must be length 3 (length of `condition`) or one, not 2",
fixed = TRUE
)
expect_error(
if_else(1:3 < 2, 1:3, 1:2),
"`false` must be length 3 (length of `condition`) or one, not 2",
fixed = TRUE
)
})
test_that("true and false must be same type and same class", {
expect_error(
if_else(1:3 < 2, 1, 1L),
"`false` must be type double, not integer",
fixed = TRUE
)
x <- factor("x")
y <- ordered("x")
expect_error(
if_else(1:3 < 2, x, y),
"`false` must be factor, not ordered/factor",
fixed = TRUE
)
})
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)
)
})
test_that("better factor support (#2197)", {
skip("Currently failing")
test_that("gives proper error messages for factor class (#2197)", {
x <- factor(1:3, labels = letters[1:3])
expect_error(
if_else(x == "a", "b", x),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", 1L, x),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", 1., x),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", TRUE, x),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", Sys.Date(), x),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", x, "b"),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", x, 1L),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", x, 1.),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", x, TRUE),
"asdf",
fixed = TRUE
)
expect_error(
if_else(x == "a", x, Sys.Date()),
"asdf",
fixed = TRUE
)
})
test_that("works with factors as both `true` and `false` (#2197)", {
x <- factor(1:3, labels = letters[1:3])
y <- factor(1:3, labels = letters[c(1, 2, 4)])
expect_equal(if_else(x == "a", x[[2]], x), x[c(2, 2, 3)])
expect_error(
if_else(x == "a", x, y),
"asdf levels in `false` don't match levels in `true`"
)
})
})
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