2 files changed, 21 insertions, 0 deletions
diff --git a/test/gleam/dynamic_test.gleam b/test/gleam/dynamic_test.gleam
index 104c1fa..9d1aeba 100644
--- a/test/gleam/dynamic_test.gleam
+++ b/test/gleam/dynamic_test.gleam
@@ -39,6 +39,18 @@ if erlang {
   }
 }
 
+if javascript {
+  external fn uint8array(List(Int)) -> dynamic.Dynamic =
+    "../gleam_stdlib_test_ffi.mjs" "uint8array"
+
+  pub fn bit_string_erlang_test() {
+    [1, 1, 2, 3, 5, 8]
+    |> uint8array
+    |> dynamic.bit_string
+    |> should.equal(Ok(<<1, 1, 2, 3, 5, 8>>))
+  }
+}
+
 pub fn string_test() {
   ""
   |> dynamic.from
diff --git a/test/gleam_stdlib_test_ffi.mjs b/test/gleam_stdlib_test_ffi.mjs
index 90eeaf0..cbf0382 100755
--- a/test/gleam_stdlib_test_ffi.mjs
+++ b/test/gleam_stdlib_test_ffi.mjs
@@ -33,3 +33,12 @@ ${passes} passes
 ${failures} failures`);
   process.exit(failures ? 1 : 0);
 }
+
+export function uint8array(list) {
+  let ints = list.toArray();
+  let array = new Uint8Array(ints.length);
+  for (let i = 0; i < ints.length; i++) {
+    array[i] = ints[i];
+  }
+  return array;
+}