use bitstring to_string

Author: CrowdHailer

src/gleam/dynamic.gleam

@@ -45,9 +45,9 @@ pub fn string(from: Dynamic) -> Result(String, String) {
   erl_string(from)
   |> result.then(
     fn(raw) {
-      case bit_string.is_utf8(raw) {
-        True -> Ok(raw)
-        False -> Error("Expected a string, got a bit_string")
+      case bit_string.to_string(raw) {
+        Ok(string) -> Ok(string)
+        Error(Nil) -> Error("Expected a string, got a bit_string")
       }
     },
   )

test/gleam/dynamic_test.gleam

@@ -17,10 +17,10 @@ pub fn bit_string_test() {
   |> dynamic.bit_string
   |> should.equal(Ok(<<"Hello":utf8>>))
 
-  <<0, 2>>
+  <<65535:16>>
   |> dynamic.from
   |> dynamic.bit_string
-  |> should.equal(Ok(<<0, 2>>))
+  |> should.equal(Ok(<<65535:16>>))
 
   1
   |> dynamic.from
@@ -44,7 +44,7 @@ pub fn string_test() {
   |> dynamic.string
   |> should.equal(Ok("Hello"))
 
-  <<0, 2>>
+  <<65535:16>>
   |> dynamic.from
   |> dynamic.string
   |> should.equal(Error("Expected a string, got a bit_string"))