test_that("databricks helpers - runtime detection", {

  Sys.setenv("DATABRICKS_RUNTIME_VERSION" = "")
  expect_no_error(on_databricks())
  expect_identical(on_databricks(), FALSE)
  expect_identical(determine_brickster_venv(), "r-brickster")

  Sys.setenv("DATABRICKS_RUNTIME_VERSION" = "14.0")
  expect_no_error(on_databricks())
  expect_identical(on_databricks(), TRUE)
  expect_null(determine_brickster_venv())

})