1'use strict';
2const common = require('../common');
3const fs = require('fs');
4const path = require('path');
5const assert = require('assert');
6const tmpdir = require('../common/tmpdir');
7const file = path.join(tmpdir.path, 'write_stream_filehandle_test.txt');
8const input = 'hello world';
9
10tmpdir.refresh();
11
12fs.promises.open(file, 'w+').then((handle) => {
13  let calls = 0;
14  const {
15    write: originalWriteFunction,
16    writev: originalWritevFunction
17  } = handle;
18  handle.write = function write() {
19    calls++;
20    return Reflect.apply(originalWriteFunction, this, arguments);
21  };
22  handle.writev = function writev() {
23    calls++;
24    return Reflect.apply(originalWritevFunction, this, arguments);
25  };
26  const stream = fs.createWriteStream(null, { fd: handle });
27
28  stream.end(input);
29  stream.on('close', common.mustCall(() => {
30    assert(calls > 0, 'expected at least one call to fileHandle.write or ' +
31    'fileHandle.writev, got 0');
32  }));
33}).then(common.mustCall());
34