Nothing
test_that("file_imgext", {
apps = c(outer(c("hdr", "nii"), c("", ".gz"), paste0))
fnames = paste0("test.", apps)
expect_equal(file_imgext(fnames),
c(".hdr", ".nii", ".hdr.gz", ".nii.gz"))
expect_equal(file_imgext(fnames, withdot = FALSE),
c("hdr", "nii", "hdr.gz", "nii.gz"))
expect_true(is.na(file_imgext("test.img")))
})
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