test_that("assert_logical() works", {
  expect_no_error(assert_logical(TRUE))
  expect_no_error(assert_logical(FALSE))
  expect_error(assert_logical())
  expect_error(assert_logical(logical()))
  expect_error(assert_logical(c(TRUE, TRUE)))
  expect_error(assert_logical(list(TRUE)))
  expect_error(assert_logical(1))
  expect_error(assert_logical("a"))
  expect_error(assert_logical(NULL))
  expect_error(assert_logical(new.env()))
})