test/parallel/test-fs-write-negativeoffset.js

'use strict';

// Tests that passing a negative offset does not crash the process

const common = require('../common');

const {
  join,
} = require('path');

const {
  closeSync,
  open,
  write,
  writeSync,
} = require('fs');

const assert = require('assert');

const tmpdir = require('../common/tmpdir');
tmpdir.refresh();

const filename = join(tmpdir.path, 'test.txt');

open(filename, 'w+', common.mustSucceed((fd) => {
  assert.throws(() => {
    write(fd, Buffer.alloc(0), -1, common.mustNotCall());
  }, {
    code: 'ERR_OUT_OF_RANGE',
  });
  assert.throws(() => {
    writeSync(fd, Buffer.alloc(0), -1);
  }, {
    code: 'ERR_OUT_OF_RANGE',
  });
  closeSync(fd);
}));

const filename2 = join(tmpdir.path, 'test2.txt');

// Make sure negative length's don't cause aborts either

open(filename2, 'w+', common.mustSucceed((fd) => {
  assert.throws(() => {
    write(fd, Buffer.alloc(0), 0, -1, common.mustNotCall());
  }, {
    code: 'ERR_OUT_OF_RANGE',
  });
  assert.throws(() => {
    writeSync(fd, Buffer.alloc(0), 0, -1);
  }, {
    code: 'ERR_OUT_OF_RANGE',
  });
  closeSync(fd);
}));