test_that("dibble() works", {
  arr1 <- array(1:6, 2:3,
                list(axis1 = letters[1:2],
                     axis2 = letters[1:3]))
  arr2 <- array(1:12, 3:4,
                list(axis2 = letters[1:3],
                     axis3 = letters[1:4]))

  expect_s3_class(dibble(arr1), "ddf_col")
  expect_s3_class(dibble(value = arr1), "tbl_ddf")

  tbl_ddf <- dibble(value1 = arr1,
                    value2 = arr2,
                    .dim_names = c("axis1", "axis2", "axis3"))

  expect_s3_class(tbl_ddf, "tbl_ddf")

  tbl_ddf2 <- dibble(tbl_ddf)
  expect_equal(tbl_ddf2, tbl_ddf)

  expect_error(dibble(value = tbl_ddf))
  expect_no_error(dibble(value = tbl_ddf[[1]]))
})

test_that("dibble_by() works", {
  df <- tidyr::expand_grid(axis1 = letters[1:3],
                           axis2 = letters[1:3]) |>
    dplyr::mutate(value = dplyr::row_number())

  expect_equal(df,
               df |>
                 dibble_by(axis1, axis2) |>
                 as_tibble())
})

test_that("as_dibble() and is_dibble() work", {
  df <- tidyr::expand_grid(axis1 = letters[1:3],
                           axis2 = letters[1:3]) |>
    dplyr::mutate(value = dplyr::row_number())

  tbl_ddf <- expect_equal(df |>
                            dplyr::group_by(axis1, axis2) |>
                            as_dibble(),
                          df |>
                            dibble_by(axis1, axis2))

  expect_equal(as_dibble(tbl_ddf), tbl_ddf)
  expect_equal(as_dibble(tbl_ddf[[1]]), tbl_ddf[[1]])

  expect_false(is_dibble(df))
  expect_true(is_dibble(tbl_ddf))
  expect_true(is_dibble(tbl_ddf[[1]]))
})