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import gleam/expect
import gleam/iterator
import gleam/list
// TODO: Property tests
// a |> from_list |> to_list == a
pub fn to_from_list_test() {
let test = fn(subject) {
subject
|> iterator.from_list
|> iterator.to_list
|> expect.equal(_, subject)
}
test([])
test([1])
test([1, 2])
test([1, 2, 4, 8])
}
// a |> from_list |> take(_, n) == a |> list.take(_, n)
pub fn take_test() {
let test = fn(n, subject) {
subject
|> iterator.from_list
|> iterator.take(_, n)
|> expect.equal(_, list.take(subject, n))
}
test(0, [])
test(1, [])
test(-1, [])
test(0, [0])
test(1, [0])
test(-1, [0])
test(0, [0, 1, 2, 3, 4])
test(1, [0, 1, 2, 3, 4])
test(2, [0, 1, 2, 3, 4])
test(22, [0, 1, 2, 3, 4])
}
// a |> from_list |> fold(_, a, f) == a |> list.fold(_, a, f)
pub fn fold_test() {
let test = fn(subject, acc, f) {
subject
|> iterator.from_list
|> iterator.fold(_, acc, f)
|> expect.equal(_, list.fold(subject, acc, f))
}
let f = fn(e, acc) { [e | acc] }
test([], [], f)
test([1], [], f)
test([1, 2, 3], [], f)
test([1, 2, 3, 4, 5, 6, 7, 8], [], f)
}
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