tests/testthat/test-ggplot-contour.R

In gvarunkumar/plotly: Create Interactive Web Graphics via 'plotly.js'

context("Contour")

volcano3d <- reshape2::melt(volcano)
names(volcano3d) <- c("x", "y", "z")
# Draw a contour plot using geom_contour
gg <- ggplot(volcano3d) + geom_contour(aes(x=x, y=y, z=z))
L <- save_outputs(gg, "contour")

test_that("geom_contour is translated to a path", {
  expect_equal(length(L$data), 1)
  expect_identical(L$data[[1]]$type, "scatter")
  expect_identical(L$data[[1]]$mode, "lines")
})