tdir <- file.path(tempdir(), "test_convert")
dir.create(tdir)
file.copy(from = list.files(test.file(),
                            full.names = TRUE),
          to = tdir, recursive = TRUE)
dir.create(file.path(tdir, "csv"))
file.rename(file.path(tdir, "spec.csv"),
            file.path(tdir, "csv", "spec.csv"))

withr::defer(unlink(tdir, recursive = TRUE), teardown_env())