| // Copyright 2017 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. |
| |
| // Flags: --allow-natives-syntax |
| |
| function testAdvanceStringIndex(lastIndex, expectedLastIndex) { |
| let exec_count = 0; |
| let last_last_index = -1; |
| |
| let fake_re = { |
| exec: () => { return (exec_count++ == 0) ? [""] : null }, |
| get lastIndex() { return lastIndex; }, |
| set lastIndex(value) { last_last_index = value }, |
| get global() { return true; }, |
| get flags() { return "g"; } |
| }; |
| |
| assertEquals([""], RegExp.prototype[Symbol.match].call(fake_re, "abc")); |
| assertEquals(expectedLastIndex, last_last_index); |
| } |
| |
| testAdvanceStringIndex(new Number(42), 43); // Value wrapper. |
| testAdvanceStringIndex(%AllocateHeapNumber(), 1); // HeapNumber. |
| testAdvanceStringIndex(4294967295, 4294967296); // HeapNumber. |
