Nothing
test_that("str_elem() works", {
expect_equal(str_elem(c("abcd", "xyz"), 3), c("c", "z"))
expect_equal(str_elem("abcd", -2), "c")
expect_equal(str_elem("abcd", 3), "c")
expect_snapshot_error(str_elem(c("a", "b"), 1:3))
})
test_that("str_elems() works", {
string <- c("abc", "def", "ghi", "vwxyz")
ans <- matrix(c(
"a", "b",
"d", "e",
"g", "h",
"v", "w"
),
ncol = 2, byrow = TRUE
)
expect_equal(str_elems(string, 1:2), ans)
expect_equal(str_elems(string, 1:2, byrow = FALSE), t(ans))
expect_equal(
str_elems(string, c(1, 2, 3, 4, -1)),
matrix(c(
"a", "b", "c", "", "c",
"d", "e", "f", "", "f",
"g", "h", "i", "", "i",
"v", "w", "x", "y", "z"
),
nrow = length(string), byrow = TRUE
)
)
expect_equal(str_elems(character(), 1:3), matrix(character(), ncol = 3))
expect_equal(
str_elems(character(), 1:3, byrow = FALSE),
t(matrix(character(), ncol = 3))
)
})
test_that("str_paste_elems() works", {
string <- c("abc", "def", "ghi", "vwxyz")
expect_equal(str_paste_elems(string, 1:2), c("ab", "de", "gh", "vw"))
expect_equal(
str_paste_elems(string, c(1, 2, 3, 4, -1)),
c("abcc", "deff", "ghii", "vwxyz")
)
expect_equal(str_paste_elems("abc", c(1, 5, 55, 43, 3)), "ac")
expect_equal(str_paste_elems(character(), c(1, 5, 55, 43, 3)), character())
})
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