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