function.rescue

1 files changed, 18 insertions, 0 deletions

diff --git a/test/gleam/function_test.gleam b/test/gleam/function_test.gleam
index eb94581..f5d34a9 100644
--- a/test/gleam/function_test.gleam
+++ b/test/gleam/function_test.gleam
@@ -1,4 +1,5 @@
 import gleam/should
+import gleam/dynamic
 import gleam/function
 import gleam/int
 import gleam/list
@@ -65,3 +66,20 @@ pub fn identity_test() {
   |> function.identity
   |> should.equal(tuple(1, 2.0))
 }
+
+external fn throw(a) -> Nil =
+  "erlang" "throw"
+
+external fn raise_error(a) -> Nil =
+  "erlang" "error"
+
+pub fn rescue_test() {
+  function.rescue(fn() { 1 })
+  |> should.equal(Ok(1))
+
+  function.rescue(fn() { throw(1) })
+  |> should.equal(Error(function.Thrown(dynamic.from(1))))
+
+  function.rescue(fn() { raise_error("") })
+  |> should.equal(Error(function.Errored(dynamic.from(""))))
+}