node/test/parallel/test-stream2-base64-single-char-read-end.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';
require('../common');
const R = require('_stream_readable');
const W = require('_stream_writable');
const assert = require('assert');

const src = new R({ encoding: 'base64' });
const dst = new W();
let hasRead = false;
const accum = [];

src._read = function(n) {
  if (!hasRead) {
    hasRead = true;
    process.nextTick(function() {
      src.push(Buffer.from('1'));
      src.push(null);
    });
  }
};

dst._write = function(chunk, enc, cb) {
  accum.push(chunk);
  cb();
};

src.on('end', function() {
  assert.strictEqual(String(Buffer.concat(accum)), 'MQ==');
  clearTimeout(timeout);
});

src.pipe(dst);

const timeout = setTimeout(function() {
  assert.fail('timed out waiting for _write');
}, 100);