tests/testthat/test_asset.R

In MilesMcBain/r2vr: Compose and Serve WebVR Scenes

context("test asset class")

test_that("A non-inline asset outputs its tag and reference",{
  my_asset <- A_Asset$new(id = "QUT", src = test_path("QUT.jpg"))
  expect_equal(
  {
    my_asset$reference()
  },
  {
   '#QUT'
  })
  expect_equal(
  {
    my_asset$render()
  },
  {
    '<a-asset-item id="QUT" src="QUT.jpg"></a-asset-item>'
  })
})

test_that("An inline asset ouputs a url reference and no tag.",{
  my_asset <- A_Asset$new(id = "QUT", src = "QUT.jpg", .inline = TRUE)
  expect_equal({
    my_asset$render()
  },
  {
   ""
  })
  expect_equal(
  {
    my_asset$reference()
  },
  {
    'src="url(QUT.jpg)"'
  })

})

test_that("Asset data reflects assets and parts",{
  my_asset <- a_asset(id = "kangaroo", src = test_path("Kangaroo_01.gltf"),
                       .parts = test_path("Kangaroo_01.bin"))
  my_asset_data <- my_asset$get_asset_data()

  expect_equal({
    my_asset_data$accessor[[1]]()
  },
  {
    readr::read_file_raw(test_path("Kangaroo_01.gltf"))
  })

  expect_equal({
    my_asset_data$accessor[[2]]()
  },
  {
    readr::read_file_raw(test_path("Kangaroo_01.bin"))
  })
})

test_that("Asset errors early when file are not found", {

  expect_error(a_asset(id = "nofile",
                       src = "./notfound.gltf")$get_asset_data(),
               "Error when rendering asset, file not found.*")

  expect_error(a_asset(id = "kangaroo",
                       src = test_path("Kangaroo_01.gltf"),
                       .parts = c(test_path("Kangaroo_01.bin"), "notfound.gltf"))$get_asset_data(),
               "Error when rendering asset, file not found.*")

})

test_that("Asset errors if path not below src", {

  expect_error(a_asset(id = "kangaroo",
                       src = test_path("Kangaroo_01.gltf"),
                       .parts = c(test_path("../Kangaroo_01.bin"), "notfound.gltf")),
               "Path to part must be at or below src.*")
})

test_that("Assets pointing to URLs error if called upon to fetch data.",{

  my_asset <- a_asset(id = "QUT",
                      src = "https://rawgit.com/MilesMcBain/r2vr/master/tests/testthat/QUT.png")

  expect_error(my_asset$get_asset_data(),
               "An asset pointing to a URL was requested to fetch its data.")
})

test_that("A url asset can be used as a texture", {
  my_asset <- a_asset(id = "QUT",
                      .tag = "img",
                      src = "https://cdn.rawgit.com/MilesMcBain/r2vr/9987bbd2/tests/testthat/QUT.png")

  my_cube <- a_entity("box", depth="2", height="2", width="2",
                      position = c(0, 2, -2),
                      src = my_asset)

  my_scene <- a_scene(.children = list(my_cube))

  expect_true({
    my_scene$serve()
    my_scene$stop()
    TRUE
  })

  expect_equal({
    my_asset$render()
  },{
    "<img id=\"QUT\" src=\"https://cdn.rawgit.com/MilesMcBain/r2vr/9987bbd2/tests/testthat/QUT.png\"></img>"
  })

})