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test: add test for format.sas trailing period stripping in XPT roundtrip #802

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test: add test for format.sas trailing period stripping in XPT roundtrip #802

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15 changes: 15 additions & 0 deletions tests/testthat/test-haven-sas.R
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Original file line number Diff line number Diff line change
Expand Up @@ -304,6 +304,21 @@ test_that("can roundtrip format attribute", {
expect_identical(df, out)
})

test_that("trailing period in format.sas is stripped during roundtrip", {
df <- tibble(
date_var = structure(as.Date("2025-01-02"), format.sas = "DATE9."),
num_var = structure(100.12345, format.sas = "BEST12.")
)

path <- tempfile()
write_xpt(df, path)
out <- read_xpt(path)

# SAS transport format does not store trailing periods
expect_equal(attr(out$date_var, "format.sas"), "DATE9")
expect_equal(attr(out$num_var, "format.sas"), "BEST12")
})

test_that("user width warns appropriately when data is wider than value", {
df <- tibble(
a = c("a", NA_character_),
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