tests/testthat/helper-vdiffr.R

In pROC: Display and Analyze ROC Curves

# Skip expect_doppelganger if vdiffr is not installed
expect_doppelganger <- function(title, fig, ...) {
  testthat::skip_if_not_installed("vdiffr")
  vdiffr::expect_doppelganger(title, fig, ...)
}

# expect_doppelganger for ggroc
expect_ggroc_doppelganger <- function(title, fig, ...) {
  testthat::skip_if_not_installed("ggplot2")
  expect_doppelganger(title, fig, ...)
}