v8/test/mjsunit/es6/string-split.js

// 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 = {toString: () => ""};
var limit = { value: 3 };
pattern[Symbol.split] = function(string, limit) {
  return string.length * limit.value;
};
// Check object coercible fails.
assertThrows(() => String.prototype.split.call(null, pattern, limit),
             TypeError);
// Override is called.
assertEquals(15, "abcde".split(pattern, limit));
// Non-callable override.
pattern[Symbol.split] = "dumdidum";
assertThrows(() => "abcde".split(pattern, limit), TypeError);
// Null override.
pattern[Symbol.split] = null;
assertEquals(["a", "b", "c", "d", "e"], "abcde".split(pattern));

assertEquals("[Symbol.split]", RegExp.prototype[Symbol.split].name);