test-fs-read-type.js

'use strict';
const common = require('../common');
const fs = require('fs');
const assert = require('assert');
const fixtures = require('../common/fixtures');

const filepath = fixtures.path('x.txt');
const fd = fs.openSync(filepath, 'r');
const expected = 'xyz\n';


// Error must be thrown with string
assert.throws(
  () => fs.read(fd, expected.length, 0, 'utf-8', common.mustNotCall()),
  {
    code: 'ERR_INVALID_ARG_TYPE',
    name: 'TypeError',
    message: 'The "buffer" argument must be an instance of Buffer, ' +
             'TypedArray, or DataView. Received type number (4)'
  }
);

[true, null, undefined, () => {}, {}].forEach((value) => {
  assert.throws(() => {
    fs.read(value,
            Buffer.allocUnsafe(expected.length),
            0,
            expected.length,
            0,
            common.mustNotCall());
  }, {
    code: 'ERR_INVALID_ARG_TYPE',
    name: 'TypeError'
  });
});

assert.throws(() => {
  fs.read(fd,
          Buffer.allocUnsafe(expected.length),
          -1,
          expected.length,
          0,
          common.mustNotCall());
}, {
  code: 'ERR_OUT_OF_RANGE',
  name: 'RangeError',
  message: 'The value of "offset" is out of range. It must be >= 0. ' +
           'Received -1'
});

assert.throws(() => {
  fs.read(fd,
          Buffer.allocUnsafe(expected.length),
          0,
          -1,
          0,
          common.mustNotCall());
}, {
  code: 'ERR_OUT_OF_RANGE',
  name: 'RangeError',
  message: 'The value of "length" is out of range. ' +
           'It must be >= 0. Received -1'
});


assert.throws(
  () => fs.readSync(fd, expected.length, 0, 'utf-8'),
  {
    code: 'ERR_INVALID_ARG_TYPE',
    name: 'TypeError',
    message: 'The "buffer" argument must be an instance of Buffer, ' +
             'TypedArray, or DataView. Received type number (4)'
  }
);

[true, null, undefined, () => {}, {}].forEach((value) => {
  assert.throws(() => {
    fs.readSync(value,
                Buffer.allocUnsafe(expected.length),
                0,
                expected.length,
                0);
  }, {
    code: 'ERR_INVALID_ARG_TYPE',
    name: 'TypeError'
  });
});

assert.throws(() => {
  fs.readSync(fd,
              Buffer.allocUnsafe(expected.length),
              -1,
              expected.length,
              0);
}, {
  code: 'ERR_OUT_OF_RANGE',
  name: 'RangeError',
  message: 'The value of "offset" is out of range. ' +
           'It must be >= 0. Received -1'
});

assert.throws(() => {
  fs.readSync(fd,
              Buffer.allocUnsafe(expected.length),
              0,
              -1,
              0);
}, {
  code: 'ERR_OUT_OF_RANGE',
  name: 'RangeError',
  message: 'The value of "length" is out of range. ' +
           'It must be >= 0. Received -1'
});

assert.throws(() => {
  fs.readSync(fd,
              Buffer.allocUnsafe(expected.length),
              0,
              expected.length + 1,
              0);
}, {
  code: 'ERR_OUT_OF_RANGE',
  name: 'RangeError',
  message: 'The value of "length" is out of range. ' +
           'It must be <= 4. Received 5'
});