fix: 修复数组回调与原始值属性访问

crates/oxide_vm/tests/builtins_string_tests.rs

@@ -16,6 +16,11 @@ fn to_str(vm: &Vm, val: JsValue) -> String {
         .unwrap_or_default()
 }
 
+fn assert_num_eq(val: JsValue, expected: f64) {
+    let actual = if val.is_int() { val.as_int() as f64 } else { val.as_double() };
+    assert_eq!(actual, expected);
+}
+
 #[test]
 fn string_index_of_found() {
     let mut vm = Vm::new();
@@ -23,6 +28,13 @@ fn string_index_of_found() {
     assert_eq!(result.as_int(), 1);
 }
 
+#[test]
+fn string_from_char_code_static() {
+    let mut vm = Vm::new();
+    let result = eval(&mut vm, "String.fromCharCode(65,66,67)").unwrap();
+    assert_eq!(to_str(&vm, result), "ABC");
+}
+
 #[test]
 fn string_index_of_not_found() {
     let mut vm = Vm::new();
@@ -86,6 +98,26 @@ fn string_to_upper_case() {
     assert_eq!(to_str(&vm, s), "HELLO");
 }
 
+#[test]
+fn string_primitive_length_autoboxes() {
+    let mut vm = Vm::new();
+    let result = eval(&mut vm, "'abc'.length").unwrap();
+    assert_num_eq(result, 3.0);
+
+    let result = eval(&mut vm, "''.length").unwrap();
+    assert_num_eq(result, 0.0);
+
+    let result = eval(&mut vm, "'abc'.length + 'de'.length").unwrap();
+    assert_num_eq(result, 5.0);
+}
+
+#[test]
+fn string_length_does_not_break_methods() {
+    let mut vm = Vm::new();
+    let s = eval(&mut vm, "'hello'.toUpperCase()").unwrap();
+    assert_eq!(to_str(&vm, s), "HELLO");
+}
+
 #[test]
 fn string_to_lower_case() {
     let mut vm = Vm::new();