fix: restore imports and add edge case coverage for Array.prototype.map

Author: AI Assistant

core/engine/src/object/tests.rs

@@ -1,16 +1,16 @@
+use crate::{TestAction, run_test_actions};
+use indoc::indoc;
+
 #[test]
 fn array_prototype_map_edge_cases() {
     run_test_actions([
         TestAction::run_harness(),
-
         // Empty array
         TestAction::assert(r#"arrayEquals([].map(x => x), [])"#),
-
         // Callback returning undefined
         TestAction::assert(
-            r#"arrayEquals([1, 2, 3].map(() => undefined), [undefined, undefined, undefined])"#
+            r#"arrayEquals([1, 2, 3].map(() => undefined), [undefined, undefined, undefined])"#,
         ),
-
         // Sparse array (check length + defined values)
         TestAction::run(indoc! {r#"
             let arr = [1, , 3];
@@ -20,8 +20,7 @@ fn array_prototype_map_edge_cases() {
         TestAction::assert("result[0] === 1"),
         TestAction::assert("!(1 in result)"),
         TestAction::assert("result[2] === 3"),
-
         // Identity mapping
         TestAction::assert(r#"arrayEquals([1, 2, 3].map(x => x), [1, 2, 3])"#),
     ]);
-}
+}