test_that("Alert() returns shiny.tag, correct name and value", {
  expect_true(inherits(Alert(), "shiny.tag"))
  expect_equal(environment(Alert()[["children"]][[2]])[["data"]][["name"]], "Alert")
  expect_equal(environment(Alert("Test")[["children"]][[2]])[["data"]][["props"]][["value"]][["children"]], "Test")
})