nodejs/test/parallel/test-stream-auto-destroy.js

'use strict';
const common = require('../common');
const stream = require('stream');
const assert = require('assert');

{
  const r = new stream.Readable({
    autoDestroy: true,
    read() {
      this.push('hello');
      this.push('world');
      this.push(null);
    },
    destroy: common.mustCall((err, cb) => cb())
  });

  let ended = false;

  r.resume();

  r.on('end', common.mustCall(() => {
    ended = true;
  }));

  r.on('close', common.mustCall(() => {
    assert(ended);
  }));
}

{
  const w = new stream.Writable({
    autoDestroy: true,
    write(data, enc, cb) {
      cb(null);
    },
    destroy: common.mustCall((err, cb) => cb())
  });

  let finished = false;

  w.write('hello');
  w.write('world');
  w.end();

  w.on('finish', common.mustCall(() => {
    finished = true;
  }));

  w.on('close', common.mustCall(() => {
    assert(finished);
  }));
}

{
  const t = new stream.Transform({
    autoDestroy: true,
    transform(data, enc, cb) {
      cb(null, data);
    },
    destroy: common.mustCall((err, cb) => cb())
  });

  let ended = false;
  let finished = false;

  t.write('hello');
  t.write('world');
  t.end();

  t.resume();

  t.on('end', common.mustCall(() => {
    ended = true;
  }));

  t.on('finish', common.mustCall(() => {
    finished = true;
  }));

  t.on('close', common.mustCall(() => {
    assert(ended);
    assert(finished);
  }));
}

{
  const r = new stream.Readable({
    read() {
      r2.emit('error', new Error('fail'));
    }
  });
  const r2 = new stream.Readable({
    autoDestroy: true,
    destroy: common.mustCall((err, cb) => cb())
  });

  r.pipe(r2);
}

{
  const r = new stream.Readable({
    read() {
      w.emit('error', new Error('fail'));
    }
  });
  const w = new stream.Writable({
    autoDestroy: true,
    destroy: common.mustCall((err, cb) => cb())
  });

  r.pipe(w);
}