Add ignored empty record decoding test

crates/compiler/test_gen/src/gen_abilities.rs

@@ -990,3 +990,23 @@ fn decode_record_two_fields_string_and_int() {
         RocStr
     )
 }
+
+#[test]
+#[cfg(any(feature = "gen-llvm", feature = "gen-wasm"))]
+#[ignore = "json parsing impl must be fixed first"]
+fn decode_empty_record() {
+    assert_evals_to!(
+        indoc!(
+            r#"
+            app "test" imports [Encode, Decode, Json] provides [main] to "./platform"
+
+            main =
+                when Str.toUtf8 "{}" |> Decode.fromBytes Json.fromUtf8 is
+                    Ok {} -> "empty"
+                    _ -> "something went wrong"
+            "#
+        ),
+        RocStr::from("empty"),
+        RocStr
+    )
+}