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'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
const fs = require('fs');
const tmpdir = require('../common/tmpdir');
const tmp = tmpdir.path;
tmpdir.refresh();
const filename = path.resolve(tmp, 'truncate-file.txt');
fs.writeFileSync(filename, 'hello world', 'utf8');
const fd = fs.openSync(filename, 'r+');
fs.truncate(fd, 5, common.mustCall(function(err) {
assert.ok(!err);
assert.strictEqual(fs.readFileSync(filename, 'utf8'), 'hello');
}));
process.on('exit', function() {
fs.closeSync(fd);
fs.unlinkSync(filename);
console.log('ok');
});
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