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#' Locate file in tests directory
#'
#' This function, similar to `testthat::test_path()`, is designed to work both
#' interactively and during tests, locating files in the `tests/` directory.
#'
#' @note `vcr_test_path()` assumes you are using testthat for your unit tests.
#'
#' @param ... Character vectors giving path component. each character string
#' gets added on to the path, e.g., `vcr_test_path("a", "b")` becomes
#' `tests/a/b` relative to the root of the package.
#'
#' @return A character vector giving the path
#' @export
#' @examples
#' if (interactive()) {
#' vcr_test_path("fixtures")
#' }
vcr_test_path <- function(...) {
if (missing(...)) stop("Please provide a directory name.")
if (any(!nzchar(...))) stop("Please use non empty path elements.")
# dirname () moves up one level from testthat dir
root <- dirname(rprojroot::find_testthat_root_file())
path <- file.path(root, ...)
if (!dir.exists(path)){
message("could not find ", path, "; creating it")
dir.create(path)
}
path
}
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