test/parallel/test-stream-duplex-props.js

'use strict';

require('../common');
const assert = require('assert');
const { Duplex } = require('stream');

{
  const d = new Duplex({
    objectMode: true,
    highWaterMark: 100
  });

  assert.strictEqual(d.writableObjectMode, true);
  assert.strictEqual(d.writableHighWaterMark, 100);
  assert.strictEqual(d.readableObjectMode, true);
  assert.strictEqual(d.readableHighWaterMark, 100);
}

{
  const d = new Duplex({
    readableObjectMode: false,
    readableHighWaterMark: 10,
    writableObjectMode: true,
    writableHighWaterMark: 100
  });

  assert.strictEqual(d.writableObjectMode, true);
  assert.strictEqual(d.writableHighWaterMark, 100);
  assert.strictEqual(d.readableObjectMode, false);
  assert.strictEqual(d.readableHighWaterMark, 10);
}