top level expressions fix (#1046)

#1033 top level expressions fix

Signed-off-by: Jess Frazelle <github@jessfraz.com>

src/wasm-lib/tests/executor/main.rs

@@ -518,3 +518,23 @@ show(part)"#;
     let result = execute_and_snapshot(code).await.unwrap();
     twenty_twenty::assert_image("tests/executor/outputs/rounded_with_holes.png", &result, 0.999);
 }
+
+#[tokio::test(flavor = "multi_thread")]
+async fn serial_test_top_level_expression() {
+    let code = r#"fn circle = (pos, radius) => {
+  const sg = startSketchOn('XY')
+    |> startProfileAt([pos[0] + radius, pos[1]], %)
+    |> arc({
+       angle_end: 360,
+       angle_start: 0,
+       radius: radius
+     }, %)
+    |> close(%)
+  return sg
+}
+
+circle([0,0], 22) |> extrude(14, %)"#;
+
+    let result = execute_and_snapshot(code).await.unwrap();
+    twenty_twenty::assert_image("tests/executor/outputs/top_level_expression.png", &result, 0.999);
+}