Add error message test.

(cherry picked from commit 5845cfa)

Author: woess

graal-js/src/com.oracle.truffle.js.test/src/com/oracle/truffle/js/test/builtins/ErrorMessageTest.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * The Universal Permissive License (UPL), Version 1.0
+ *
+ * Subject to the condition set forth below, permission is hereby granted to any
+ * person obtaining a copy of this software, associated documentation and/or
+ * data (collectively the "Software"), free of charge and under any and all
+ * copyright rights in the Software, and any and all patent rights owned or
+ * freely licensable by each licensor hereunder covering either (i) the
+ * unmodified Software as contributed to or provided by such licensor, or (ii)
+ * the Larger Works (as defined below), to deal in both
+ *
+ * (a) the Software, and
+ *
+ * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+ * one is included with the Software each a "Larger Work" to which the Software
+ * is contributed by such licensors),
+ *
+ * without restriction, including without limitation the rights to copy, create
+ * derivative works of, display, perform, and distribute the Software and make,
+ * use, sell, offer for sale, import, export, have made, and have sold the
+ * Software and the Larger Work(s), and to sublicense the foregoing rights on
+ * either these or other terms.
+ *
+ * This license is subject to the following condition:
+ *
+ * The above copyright notice and either this complete permission notice or at a
+ * minimum a reference to the UPL must be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.oracle.truffle.js.test.builtins;
+
+import org.graalvm.polyglot.Context;
+import org.graalvm.polyglot.PolyglotException;
+import org.graalvm.polyglot.Value;
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.oracle.truffle.js.lang.JavaScriptLanguage;
+import com.oracle.truffle.js.test.JSTest;
+
+public class ErrorMessageTest {
+
+    /**
+     * GR-63023: Provide a better error message by querying error name and message properties.
+     */
+    @Test
+    public void testErrorNameAndMessage() {
+        for (boolean as : new boolean[]{false, true}) {
+            try (Context context = JSTest.newContextBuilder().build()) {
+                Value customErrorClass = context.eval(JavaScriptLanguage.ID, """
+                                class CustomError extends Error {
+                                    constructor(initialMessage, name, message) {
+                                        super(initialMessage ?? undefined);
+                                        if (name != undefined) {
+                                            this.name = name;
+                                        }
+                                        if (message != undefined) {
+                                            this.message = message;
+                                        }
+                                    }
+                                }
+                                CustomError;
+                                """);
+
+                Value errorObject;
+                PolyglotException polyglotException;
+                // override name and message
+                errorObject = customErrorClass.newInstance("initial message", "ExpectedError", "expected message");
+                polyglotException = asPolyglotException(errorObject, as);
+                Assert.assertEquals("ExpectedError: expected message", polyglotException.getMessage());
+
+                // override only message
+                errorObject = customErrorClass.newInstance("initial message", null, "expected message");
+                polyglotException = asPolyglotException(errorObject, as);
+                Assert.assertEquals("CustomError: expected message", polyglotException.getMessage());
+
+                // override only name
+                errorObject = customErrorClass.newInstance("initial message", "ExpectedError");
+                polyglotException = asPolyglotException(errorObject, as);
+                Assert.assertEquals("ExpectedError: initial message", polyglotException.getMessage());
+
+                // override only name, no message
+                errorObject = customErrorClass.newInstance(null, "ExpectedError");
+                polyglotException = asPolyglotException(errorObject, as);
+                Assert.assertEquals("ExpectedError", polyglotException.getMessage());
+
+                // override none
+                errorObject = customErrorClass.newInstance("initial message");
+                polyglotException = asPolyglotException(errorObject, as);
+                Assert.assertEquals("CustomError: initial message", polyglotException.getMessage());
+            }
+        }
+    }
+
+    private static PolyglotException asPolyglotException(Value exception, boolean as) {
+        if (as) {
+            return exception.as(PolyglotException.class);
+        } else {
+            try {
+                exception.throwException();
+                throw new AssertionError("Expected PolyglotException");
+            } catch (PolyglotException polyglotException) {
+                return polyglotException;
+            }
+        }
+    }
+}