skip_if_not_installed("chemometrics")

data(NIR, package = "chemometrics")
NIR_sub <- data.frame(NIR$yGlcEtOH, NIR$xNIR[, 1:3])

test_that("warnings", {
  expect_warning(
    ggfacet(iris, columnsX = 1:5, columnsY = 1),
    "1 factor variables are being removed from X columns"
  )
  expect_warning(
    ggfacet(iris, columnsX = 1, columnsY = 1:5),
    "1 factor variables are being removed from Y columns"
  )
})

test_that("generally works", {
  # factor variables
  vdiffr::expect_doppelganger(
    "factor",
    ggfacet(
      NIR_sub,
      columnsY = 1:2, columnsX = 3:5,
      fn = ggally_smooth_loess
    )
  )

  vdiffr::expect_doppelganger(
    "pigs",
    ggts(pigs, "time", c("gilts", "profit", "s_per_herdsz", "production", "herdsz"))
  )
})