text: 'use strict';
  
  const { mustCall, hasCrypto, skip } = require('../common');
  if (!hasCrypto)
    skip('missing crypto');
  const assert = require('assert');
  const { createServer, connect } = require('http2');
  const { once } = require('events');
  
  // This test ensures that `bufferSize` of Http2Session and Http2Stream work
  // as expected.
  {
    const kSockets = 2;
    const kTimes = 10;
    const kBufferSize = 30;
    const server = createServer();
  
    let client;
  
    const getStream = async () => {
      const [ stream ] = await once(server, 'stream');
      stream.on('data', mustCall());
      stream.on('end', mustCall());
      stream.on('close', mustCall());
      return once(stream, 'close');
    };
  
    const promises = [...new Array(kSockets)].map(getStream);
    Promise.all(promises).then(mustCall(() => {
      client.close();
      server.close();
    }));
  
    server.listen(0, mustCall(() => {
      const authority = `http://localhost:${server.address().port}`;
      client = connect(authority);
  
      client.once('connect', mustCall());
  
      for (let j = 0; j < kSockets; j += 1) {
        const stream = client.request({ ':method': 'POST' });
        stream.on('data', () => {});
  
        for (let i = 0; i < kTimes; i += 1) {
          stream.write(Buffer.allocUnsafe(kBufferSize), mustCall());
          const expectedSocketBufferSize = kBufferSize * (i + 1);
          assert.strictEqual(stream.bufferSize, expectedSocketBufferSize);
        }
        stream.end();
        stream.close();
      }
    }));
  }
  