tests/testthat/helper-vdiffr.R

In jrnold/ggthemes: Extra Themes, Scales and Geoms for 'ggplot2'

expect_doppelganger <- function(title, fig, path = NULL) {
  # need to call conditionally because vdiffr listed in Suggests (#124)
  testthat::skip_if_not_installed("vdiffr")
  vdiffr::expect_doppelganger(title, fig)
}