// Copyright 2015 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. var pattern = {}; pattern[Symbol.match] = function(string) { return string.length; }; // Check object coercible fails. assertThrows(() => String.prototype.match.call(null, pattern), TypeError); // Override is called. assertEquals(5, "abcde".match(pattern)); // Non-callable override. pattern[Symbol.match] = "dumdidum"; assertThrows(() => "abcde".match(pattern), TypeError); assertEquals("[Symbol.match]", RegExp.prototype[Symbol.match].name);