js/src/jsapi-tests/testStringIsArrayIndex.cpp
author Jon Coppeard <jcoppeard@mozilla.com>
Mon, 14 Jan 2019 11:02:35 +0000
changeset 453704 1cebf4f5c850ad22500a360c2742de3c9dd78c81
parent 448963 66eb1f485c1a3ea81372758bc92292c9428b17cd
permissions -rw-r--r--
Bug 1519397 - Factor GC locking RAII classes out of vm/Runtime.h r=pbone

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "jsfriendapi.h"

#include "jsapi-tests/tests.h"

using mozilla::ArrayLength;

// Need to account for string literals including the \0 at the end.
#define STR(x) x, (ArrayLength(x) - 1)

static const struct TestTuple {
  /* The string being tested. */
  const char* string;
  /* The number of characters from the string to use. */
  size_t length;
  /* Whether this string is an index. */
  bool isindex;
  /* If it's an index, what index it is.  Ignored if not an index. */
  uint32_t index;
} tests[] = {
    {STR("0"), true, 0},
    {STR("1"), true, 1},
    {STR("2"), true, 2},
    {STR("9"), true, 9},
    {STR("10"), true, 10},
    {STR("15"), true, 15},
    {STR("16"), true, 16},
    {STR("17"), true, 17},
    {STR("99"), true, 99},
    {STR("100"), true, 100},
    {STR("255"), true, 255},
    {STR("256"), true, 256},
    {STR("257"), true, 257},
    {STR("999"), true, 999},
    {STR("1000"), true, 1000},
    {STR("4095"), true, 4095},
    {STR("4096"), true, 4096},
    {STR("9999"), true, 9999},
    {STR("1073741823"), true, 1073741823},
    {STR("1073741824"), true, 1073741824},
    {STR("1073741825"), true, 1073741825},
    {STR("2147483647"), true, 2147483647},
    {STR("2147483648"), true, 2147483648u},
    {STR("2147483649"), true, 2147483649u},
    {STR("4294967294"), true, 4294967294u},
    {STR("4294967295"), false,
     0},  // Not an array index because need to be able to represent length
    {STR("-1"), false, 0},
    {STR("abc"), false, 0},
    {STR(" 0"), false, 0},
    {STR("0 "), false, 0},
    // Tests to make sure the passed-in length is taken into account
    {"0 ", 1, true, 0},
    {"123abc", 3, true, 123},
    {"123abc", 2, true, 12},
};

BEGIN_TEST(testStringIsArrayIndex) {
  for (size_t i = 0, sz = ArrayLength(tests); i < sz; i++) {
    uint32_t index;
    bool isindex =
        js::StringIsArrayIndex(tests[i].string, tests[i].length, &index);
    CHECK_EQUAL(isindex, tests[i].isindex);
    if (isindex) {
      CHECK_EQUAL(index, tests[i].index);
    }
  }

  return true;
}
END_TEST(testStringIsArrayIndex)