test_that("Plot3() plots", {
  skip_if_not_installed("vdiffr", minimum_version = "1.0.0")
  library("vdiffr")
  skip_if(packageVersion("graphics") < "4.3")
  
  expect_doppelganger("Simple plot", function() {
    disorder <- c(1, 5, 2, 6, 3, 7, 4, 8, 5, 9, 10)
    Plot3(disorder, disorder, 6 - disorder, pch = 21, cex = 18,
          asp = 1, xlab = "", ylab = "",
          bg = "white",
          plot.bg = "#bbeedd99",
          #shrink = 0,
          frame.plot = FALSE)
  })
  
  
  expect_doppelganger("Plotting order", function() {
    pts <- cbind(1:10, 11:20, c(1, 1, 1, 1, 10, 10, 10, 5, 6, 7))
    Plot3(pts,
          pch = c(3, rep(22, 4), rep(21, 4), 4),
          cex = c(rep(18, 6), 15, rep(18, 3)),
          col = c("red", rep(1, 4), rep(3, 4), 2),
          bg = c(rep("#ff555511", 5), rep("#bbbbff11", 5)),
          fog = 0.8, shrink = 0.8,
          asp = 1, xlab = "", ylab = "", frame.plot = FALSE)
  })
  
})