test-fs-read-stream-fd.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
const common = require('../common');
const fs = require('fs');
const assert = require('assert');
const path = require('path');
const tmpdir = require('../common/tmpdir');
const file = path.join(tmpdir.path, '/read_stream_fd_test.txt');
const input = 'hello world';

let output = '';
tmpdir.refresh();
fs.writeFileSync(file, input);

const fd = fs.openSync(file, 'r');
const stream = fs.createReadStream(null, { fd: fd, encoding: 'utf8' });

assert.strictEqual(stream.path, undefined);

stream.on('data', common.mustCallAtLeast((data) => {
  output += data;
}));

process.on('exit', () => {
  assert.strictEqual(output, input);
});