// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- es6id: 19.5.6.1.1 description: > A new instance has the message property if created with a parameter info: | 19.5.6.1.1 NativeError ( message ) ... 4. If message is not undefined, then a. Let msg be ToString(message). b. Let msgDesc be the PropertyDescriptor{[[Value]]: msg, [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true}. c. Let status be DefinePropertyOrThrow(O, "message", msgDesc). ... includes: [propertyHelper.js] ---*/ class Err extends RangeError {} Err.prototype.message = 'custom-range-error'; var err1 = new Err('foo 42'); assert.sameValue(err1.message, 'foo 42'); assert(err1.hasOwnProperty('message')); verifyWritable(err1, 'message'); verifyNotEnumerable(err1, 'message'); verifyConfigurable(err1, 'message'); var err2 = new Err(); assert.sameValue(err2.hasOwnProperty('message'), false); assert.sameValue(err2.message, 'custom-range-error'); reportCompare(0, 0);