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