nodejs/test/parallel/test-http-client-readable.js

// Copyright Joyent, Inc. and other Node contributors.
//
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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.
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// 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 strict';
const common = require('../common');
const assert = require('assert');
const http = require('http');

const Duplex = require('stream').Duplex;

class FakeAgent extends http.Agent {
  createConnection() {
    const s = new Duplex();
    let once = false;

    s._read = function() {
      if (once)
        return this.push(null);
      once = true;

      this.push('HTTP/1.1 200 Ok\r\nTransfer-Encoding: chunked\r\n\r\n');
      this.push('b\r\nhello world\r\n');
      this.readable = false;
      this.push('0\r\n\r\n');
    };

    // Blackhole
    s._write = function(data, enc, cb) {
      cb();
    };

    s.destroy = s.destroySoon = function() {
      this.writable = false;
    };

    return s;
  }
}

let received = '';

const req = http.request({
  agent: new FakeAgent()
}, common.mustCall(function requestCallback(res) {
  res.on('data', function dataCallback(chunk) {
    received += chunk;
  });

  res.on('end', common.mustCall(function endCallback() {
    assert.strictEqual(received, 'hello world');
  }));
}));
req.end();