1 files changed, 14 insertions, 0 deletions
diff --git a/test/gleam/result_test.gleam b/test/gleam/result_test.gleam
index 7eb55c4..2fa9298 100644
--- a/test/gleam/result_test.gleam
+++ b/test/gleam/result_test.gleam
@@ -86,3 +86,17 @@ pub fn unwrap_test() {
   |> result.unwrap(50)
   |> should.equal(50)
 }
+
+pub fn nil_error_test() {
+  Error("error_string")
+  |> result.nil_error
+  |> should.equal(Error(Nil))
+
+  Error(123)
+  |> result.nil_error
+  |> should.equal(Error(Nil))
+
+  Ok(1)
+  |> result.nil_error
+  |> should.equal(Ok(1))
+}