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test: add NA, empty string, and mixed whitespace tests for str_trim/str_squish #606

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test: add NA, empty string, and mixed whitespace tests for str_trim/str_squish #606

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30 changes: 30 additions & 0 deletions tests/testthat/test-trim.R
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,36 @@ test_that("str_squish removes excess spaces from all parts of string", {
expect_equal(str_squish("\ta\t bc\t"), "a bc")
})

test_that("str_trim handles NA values", {
expect_equal(str_trim(NA), NA_character_)
expect_equal(str_trim(c(NA, " abc ")), c(NA, "abc"))
expect_equal(str_trim(NA, "left"), NA_character_)
expect_equal(str_trim(NA, "right"), NA_character_)
})

test_that("str_squish handles NA values", {
expect_equal(str_squish(NA), NA_character_)
expect_equal(str_squish(c(NA, " a b ")), c(NA, "a b"))
})

test_that("str_trim handles empty strings", {
expect_equal(str_trim(""), "")
expect_equal(str_trim(" "), "")
})

test_that("str_squish handles empty strings", {
expect_equal(str_squish(""), "")
expect_equal(str_squish(" "), "")
})

test_that("str_squish handles newlines and mixed whitespace", {
expect_equal(str_squish("a\n\nb"), "a b")
expect_equal(str_squish("\na\n"), "a")
expect_equal(str_squish("a\r\nb"), "a b")
expect_equal(str_squish("a\t\n b"), "a b")
expect_equal(str_squish("\t\n a \n\t b \t\n"), "a b")
})

test_that("trimming functions preserve names", {
x <- c(C = "3", B = "2", A = "1")
expect_equal(names(str_trim(x)), names(x))
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