test-fs-empty-readStream.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var common = require('../common');
var assert = require('assert');
var path = require('path');
var fs = require('fs');

var emptyFile = path.join(common.fixturesDir, 'empty.txt');

fs.open(emptyFile, 'r', function (error, fd) {
  assert.ifError(error);

  var read = fs.createReadStream(emptyFile, { 'fd': fd });

  read.once('data', function () {
    throw new Error('data event should not emit');
  });

  var readEmit = false;
  read.once('end', function () {
    readEmit = true;
    console.error('end event 1');
  });

  setTimeout(function () {
    assert.equal(readEmit, true);
  }, 50);
});

fs.open(emptyFile, 'r', function (error, fd) {
  assert.ifError(error);

  var read = fs.createReadStream(emptyFile, { 'fd': fd });
  read.pause();

  read.once('data', function () {
    throw new Error('data event should not emit');
  });

  var readEmit = false;
  read.once('end', function () {
    readEmit = true;
    console.error('end event 2');
  });

  setTimeout(function () {
    assert.equal(readEmit, false);
  }, 50);
});