From 7e4fa18e09402a5a23c517351a4b832f9b3697a8 Mon Sep 17 00:00:00 2001
From: Cam Walter <cam.n.walter@gmail.com>
Date: Mon, 19 Aug 2024 18:25:57 -0600
Subject: [PATCH] NativeError: Add ES2022 `cause`

This fixes a couple other test cases involving toString() as well.
---
 .../org/mozilla/javascript/NativeError.java   | 34 ++++++++++++++-----
 tests/testsrc/test262.properties              |  9 ++---
 2 files changed, 27 insertions(+), 16 deletions(-)

diff --git a/rhino/src/main/java/org/mozilla/javascript/NativeError.java b/rhino/src/main/java/org/mozilla/javascript/NativeError.java
index f766ebf45..be88a7498 100644
--- a/rhino/src/main/java/org/mozilla/javascript/NativeError.java
+++ b/rhino/src/main/java/org/mozilla/javascript/NativeError.java
@@ -34,8 +34,8 @@ final class NativeError extends IdScriptableObject {
         ScriptableObject.putProperty(obj, "message", "");
         ScriptableObject.putProperty(obj, "fileName", "");
         ScriptableObject.putProperty(obj, "lineNumber", 0);
-        obj.setAttributes("name", ScriptableObject.DONTENUM);
-        obj.setAttributes("message", ScriptableObject.DONTENUM);
+        obj.setAttributes("name", DONTENUM);
+        obj.setAttributes("message", DONTENUM);
         obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
         NativeCallSite.init(obj, sealed);
     }
@@ -51,13 +51,22 @@ final class NativeError extends IdScriptableObject {
         if (arglen >= 1) {
             if (!Undefined.isUndefined(args[0])) {
                 ScriptableObject.putProperty(obj, "message", ScriptRuntime.toString(args[0]));
-                obj.setAttributes("message", ScriptableObject.DONTENUM);
+                obj.setAttributes("message", DONTENUM);
             }
             if (arglen >= 2) {
-                ScriptableObject.putProperty(obj, "fileName", args[1]);
-                if (arglen >= 3) {
-                    int line = ScriptRuntime.toInt32(args[2]);
-                    ScriptableObject.putProperty(obj, "lineNumber", line);
+                if (args[1] instanceof NativeObject) {
+                    NativeObject options = (NativeObject) args[1];
+                    Object cause = ScriptableObject.getProperty(options, "cause");
+                    if (cause != NOT_FOUND) {
+                        ScriptableObject.putProperty(obj, "cause", cause);
+                        obj.setAttributes("cause", DONTENUM);
+                    }
+                } else {
+                    ScriptableObject.putProperty(obj, "fileName", ScriptRuntime.toString(args[1]));
+                    if (arglen >= 3) {
+                        ScriptableObject.putProperty(
+                                obj, "lineNumber", ScriptRuntime.toInt32(args[2]));
+                    }
                 }
             }
         }
@@ -106,6 +115,10 @@ final class NativeError extends IdScriptableObject {
         return toString instanceof String ? (String) toString : super.toString();
     }
 
+    private static NativeError realThis(Scriptable thisObj, IdFunctionObject f) {
+        return ensureType(thisObj, NativeError.class, f);
+    }
+
     @Override
     protected void initPrototypeId(int id) {
         String s;
@@ -145,7 +158,10 @@ final class NativeError extends IdScriptableObject {
                 return err;
 
             case Id_toString:
-                return js_toString(thisObj);
+                if (thisObj != scope && thisObj instanceof NativeObject) {
+                    return js_toString(thisObj);
+                }
+                return js_toString(realThis(thisObj, f));
 
             case Id_toSource:
                 return js_toSource(cx, scope, thisObj);
@@ -311,7 +327,7 @@ final class NativeError extends IdScriptableObject {
         // at the time captureStackTrace was called. Stack traces collected through
         // Error.captureStackTrace are immediately collected, formatted,
         // and attached to the given error object.
-        obj.defineProperty(STACK_TAG, err.get(STACK_TAG), ScriptableObject.DONTENUM);
+        obj.defineProperty(STACK_TAG, err.get(STACK_TAG), DONTENUM);
     }
 
     @Override
diff --git a/tests/testsrc/test262.properties b/tests/testsrc/test262.properties
index 63058c34d..9a66b5584 100644
--- a/tests/testsrc/test262.properties
+++ b/tests/testsrc/test262.properties
@@ -737,15 +737,11 @@ built-ins/Date 90/770 (11.69%)
     value-to-primitive-result-string.js
     year-zero.js
 
-built-ins/Error 10/41 (24.39%)
-    prototype/toString/called-as-function.js
-    prototype/toString/invalid-receiver.js
+built-ins/Error 6/41 (14.63%)
     prototype/toString/not-a-constructor.js {unsupported: [Reflect.construct]}
     prototype/no-error-data.js
     prototype/S15.11.4_A2.js
     cause_abrupt.js
-    cause_property.js
-    constructor.js
     is-a-constructor.js {unsupported: [Reflect.construct]}
     proto-from-ctor-realm.js {unsupported: [Reflect]}
 
@@ -1066,7 +1062,7 @@ built-ins/Math 51/326 (15.64%)
 
 built-ins/NaN 0/6 (0.0%)
 
-built-ins/NativeErrors 44/117 (37.61%)
+built-ins/NativeErrors 43/117 (36.75%)
     AggregateError/prototype 6/6 (100.0%)
     AggregateError 19/19 (100.0%)
     EvalError/prototype/not-error-object.js
@@ -1087,7 +1083,6 @@ built-ins/NativeErrors 44/117 (37.61%)
     URIError/prototype/not-error-object.js
     URIError/is-a-constructor.js {unsupported: [Reflect.construct]}
     URIError/proto-from-ctor-realm.js {unsupported: [Reflect]}
-    cause_property_native_error.js
 
 built-ins/Number 24/335 (7.16%)
     isFinite/not-a-constructor.js {unsupported: [Reflect.construct]}