1 files changed, 18 insertions, 0 deletions
diff --git a/test/gleam/dynamic_test.gleam b/test/gleam/dynamic_test.gleam
index 2b272d4..f4e78a0 100644
--- a/test/gleam/dynamic_test.gleam
+++ b/test/gleam/dynamic_test.gleam
@@ -5,6 +5,7 @@ import gleam/list
 import gleam/should
 import gleam/result
 import gleam/map
+import gleam/option.{None, Some}
 
 pub fn bit_string_test() {
   ""
@@ -220,6 +221,23 @@ pub fn typed_list_test() {
   |> should.be_error
 }
 
+pub fn option_test() {
+  let Ok(null) = atom.from_string("null")
+
+  1
+  |> dynamic.from
+  |> dynamic.option(dynamic.int)
+  |> should.equal(Ok(Some(1)))
+  null
+  |> dynamic.from
+  |> dynamic.option(dynamic.int)
+  |> should.equal(Ok(None))
+  1
+  |> dynamic.from
+  |> dynamic.option(dynamic.string)
+  |> should.be_error
+}
+
 pub fn field_test() {
   let Ok(ok_atom) = atom.from_string("ok")
   let Ok(error_atom) = atom.from_string("error")