'use strict'; const common = require('../common'); const assert = require('assert'); const path = require('path'); const fs = require('fs'); const filepath = path.join(common.fixturesDir, 'x.txt'); const fd = fs.openSync(filepath, 'r'); const expected = 'xyz\n'; fs.read(fd, expected.length, 0, 'utf-8', common.mustCall((err, str, bytesRead) => { assert.ifError(err); assert.strictEqual(str, expected); assert.strictEqual(bytesRead, expected.length); })); var r = fs.readSync(fd, expected.length, 0, 'utf-8'); assert.strictEqual(r[0], expected); assert.strictEqual(r[1], expected.length);