feat: 注入 harness 并补齐关键全局内建

crates/oxide_vm/tests/builtins_array_tests.rs

@@ -187,6 +187,15 @@ fn array_empty_literal() {
     assert_eq!(obj.prop_count(), 0);
 }
 
+#[test]
+fn array_is_array_static_method() {
+    let (_vm, result) = eval("Array.isArray([])").unwrap();
+    assert_eq!(result, JsValue::bool(true));
+
+    let (_vm, result) = eval("Array.isArray({})").unwrap();
+    assert_eq!(result, JsValue::bool(false));
+}
+
 #[test]
 fn array_shift_removes_first() {
     let (_vm, result) = eval("[1,2,3].shift()").unwrap();

crates/oxide_vm/tests/builtins_function_tests.rs

@@ -36,7 +36,7 @@ fn function_to_string_includes_function() {
     let result = eval(&mut vm, "Math.max.toString()").unwrap();
     assert!(result.is_string());
     let rendered = vm.kernel().string_forge().lookup(result.as_string_index()).unwrap_or_default();
-    assert!(rendered.contains("function"), "got: {}", rendered);
+    assert_eq!(rendered, "function max() { [native code] }");
 }
 
 #[test]

crates/oxide_vm/tests/builtins_globals_tests.rs

@@ -76,3 +76,10 @@ fn division_by_zero_gives_infinity() {
     assert!(result.is_double());
     assert!(result.as_double().is_infinite());
 }
+
+#[test]
+fn global_this_points_to_global_object() {
+    let result = eval("globalThis.Object === Object").unwrap();
+    assert!(result.is_bool());
+    assert!(result.as_bool());
+}

crates/oxide_vm/tests/builtins_object_tests.rs

@@ -37,6 +37,18 @@ fn object_assign_copies() {
     assert!(result.is_object());
 }
 
+#[test]
+fn object_is_uses_same_value_semantics() {
+    let (_vm, result) = eval("Object.is(NaN, NaN)").unwrap();
+    assert_eq!(result, JsValue::bool(true));
+
+    let (_vm, result) = eval("Object.is(1, 1)").unwrap();
+    assert_eq!(result, JsValue::bool(true));
+
+    let (_vm, result) = eval("Object.is(1, '1')").unwrap();
+    assert_eq!(result, JsValue::bool(false));
+}
+
 #[test]
 fn object_get_own_property_descriptor_value() {
     let (_vm, result) = eval("Object.getOwnPropertyDescriptor({a:1},'a')").unwrap();