Add {iterator, list}.last

2 files changed, 18 insertions, 0 deletions

diff --git a/test/gleam/iterator_test.gleam b/test/gleam/iterator_test.gleam
index 492bb1e..84459a2 100644
--- a/test/gleam/iterator_test.gleam
+++ b/test/gleam/iterator_test.gleam
@@ -383,3 +383,13 @@ pub fn reduce_test() {
   |> iterator.reduce(with: fn(x, y) { x + y })
   |> should.equal(Ok(15))
 }
+
+pub fn last_test() {
+  iterator.from_list([])
+  |> iterator.last
+  |> should.equal(Error(Nil))
+
+  iterator.range(1, 10)
+  |> iterator.last
+  |> should.equal(Ok(9))
+}
diff --git a/test/gleam/list_test.gleam b/test/gleam/list_test.gleam
index 572812c..5fe2dd5 100644
--- a/test/gleam/list_test.gleam
+++ b/test/gleam/list_test.gleam
@@ -645,3 +645,11 @@ pub fn scan_test() {
   )
   |> should.equal(["Odd", "OddEven", "OddEvenOdd", "OddEvenOddEven"])
 }
+
+pub fn last_test() {
+  list.last([])
+  |> should.equal(Error(Nil))
+
+  list.last([1, 2, 3, 4, 5])
+  |> should.equal(Ok(5))
+}