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test_that("special cases are correct", {
expect_equal(str_split(NA, "")[[1]], NA_character_)
expect_equal(str_split(character(), ""), list())
})
test_that("str_split functions as expected", {
expect_equal(
str_split(c("bab", "cac", "dadad"), "a"),
list(c("b", "b"), c("c", "c"), c("d", "d", "d"))
)
})
test_that("str_split() can split by special patterns", {
expect_equal(str_split("ab", ""), list(c("a", "b")))
expect_equal(
str_split("this that.", boundary("word")),
list(c("this", "that"))
)
expect_equal(str_split("a-b", fixed("-")), list(c("a", "b")))
expect_equal(
str_split("aXb", coll("X", ignore_case = TRUE)),
list(c("a", "b"))
)
})
test_that("boundary() can be recycled", {
expect_equal(str_split(c("x", "y"), boundary()), list("x", "y"))
})
test_that("str_split() can control maximum number of splits", {
expect_equal(
str_split(c("a", "a-b"), n = 1, "-"),
list("a", "a-b")
)
expect_equal(
str_split(c("a", "a-b"), n = 3, "-"),
list("a", c("a", "b"))
)
})
test_that("str_split() checks its inputs", {
expect_snapshot(error = TRUE, {
str_split(letters[1:3], letters[1:2])
str_split("x", 1)
str_split("x", "x", n = 0)
})
})
test_that("str_split_1 takes string and returns character vector", {
expect_equal(str_split_1("abc", ""), c("a", "b", "c"))
expect_snapshot_error(str_split_1(letters, ""))
})
test_that("str_split_fixed pads with empty string", {
expect_equal(
str_split_fixed(c("a", "a-b"), "-", 1),
cbind(c("a", "a-b"))
)
expect_equal(
str_split_fixed(c("a", "a-b"), "-", 2),
cbind(c("a", "a"), c("", "b"))
)
expect_equal(
str_split_fixed(c("a", "a-b"), "-", 3),
cbind(c("a", "a"), c("", "b"), c("", ""))
)
})
test_that("str_split_fixed check its inputs", {
expect_snapshot(str_split_fixed("x", "x", 0), error = TRUE)
})
# str_split_i -------------------------------------------------------------
test_that("str_split_i can extract from LHS or RHS", {
expect_equal(str_split_i(c("1-2-3", "4-5"), "-", 1), c("1", "4"))
expect_equal(str_split_i(c("1-2-3", "4-5"), "-", -1), c("3", "5"))
})
test_that("str_split_i returns NA for absent components", {
expect_equal(str_split_i(c("a", "b-c"), "-", 2), c(NA, "c"))
expect_equal(str_split_i(c("a", "b-c"), "-", 3), c(NA_character_, NA))
expect_equal(str_split_i(c("1-2-3", "4-5"), "-", -3), c("1", NA))
expect_equal(str_split_i(c("1-2-3", "4-5"), "-", -4), c(NA_character_, NA))
})
test_that("str_split_i check its inputs", {
expect_snapshot(error = TRUE, {
str_split_i("x", "x", 0)
str_split_i("x", "x", 0.5)
})
})
test_that("split functions preserve names on outer structures", {
x <- c(C = "3", B = "2", A = "1")
expect_equal(names(str_split(x, "")), names(x))
expect_equal(rownames(str_split(x, "", simplify = TRUE)), names(x))
expect_equal(rownames(str_split_fixed(x, "", 1)), names(x))
})
test_that("str_split_i() preserves names", {
x <- c(C = "3", B = "2", A = "1")
expect_equal(names(str_split_i(x, " ", 1)), names(x))
})
test_that("split handles vectorised patterns and names", {
x1 <- c(A = "ab")
p2 <- c("a", "b")
expect_null(names(str_split(x1, p2)))
expect_null(rownames(str_split(x1, p2, simplify = TRUE)))
expect_null(rownames(str_split_fixed(x1, p2, 1)))
x2 <- c(A = "ab", B = "cd")
expect_equal(names(str_split(x2, p2)), names(x2))
expect_equal(rownames(str_split(x2, p2, simplify = TRUE)), names(x2))
expect_equal(rownames(str_split_fixed(x2, p2, 1)), names(x2))
})
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