terminal-cv/node_modules/@parcel/fs-write-stream-atomic/test/slow-close.js

'use strict';
var fs = require('graceful-fs');
var path = require('path');
var test = require('tap').test;
var rimraf = require('rimraf');
var writeStream = require('../index.js');

var target = path.resolve(__dirname, 'test-chown');

test('slow close', function(t) {
  t.plan(2);
  // The goal here is to simulate the "file close" step happening so slowly
  // that the whole close/rename process could finish before the file is
  // actually closed (and thus buffers truely flushed to the OS). In
  // previous versions of this module, this would result in the module
  // emitting finish & close before the file was fully written and in
  // turn, could break other layers that tried to read the new file.
  var realEmit = fs.WriteStream.prototype.emit;
  var reallyClosed = false;
  fs.WriteStream.prototype.emit = function(event) {
    if (event !== 'close') return realEmit.apply(this, arguments);
    setTimeout(
      function() {
        reallyClosed = true;
        realEmit.call(this, 'close');
      }.bind(this),
      200,
    );
  };
  var stream = writeStream(target);
  stream.on('finish', function() {
    t.is(reallyClosed, true, "didn't finish before target was closed");
  });
  stream.on('close', function() {
    t.is(reallyClosed, true, "didn't close before target was closed");
  });
  stream.end();
});

test('cleanup', function(t) {
  rimraf.sync(target);
  t.end();
});