text: // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // 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,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // 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,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  'use strict';
  // Flags: --expose-gc
  
  const common = require('../common');
  const onGC = require('../common/ongc');
  const assert = require('assert');
  const net = require('net');
  
  // Test that the implicit listener for an 'connect' event on net.Sockets is
  // added using `once()`, i.e. can be gc'ed once that event has occurred.
  
  const server = net.createServer(common.mustCall()).listen(0);
  
  let collected = false;
  const gcListener = { ongc() { collected = true; } };
  
  {
    const gcObject = {};
    onGC(gcObject, gcListener);
  
    const sock = net.createConnection(
      server.address().port,
      common.mustCall(() => {
        assert.strictEqual(gcObject, gcObject); // Keep reference alive
        assert.strictEqual(collected, false);
        setImmediate(done, sock);
      }));
  }
  
  function done(sock) {
    global.gc();
    setImmediate(() => {
      assert.strictEqual(collected, true);
      sock.end();
      server.close();
    });
  }
  