Note that this depends on elipses-large.txt, which is just elipses.txt concatenated onto itself several (I used 6) times

test-pump-file2http.js

var common = require('../common');
var assert = require('assert');
var fs = require('fs');
var http = require('http');
var util = require('util');
var path = require('path');
var fn = path.join(common.fixturesDir, 'elipses-large.txt');

var client_req_complete = false;
var expected = fs.readFileSync(fn, 'utf8');
var buffer = '';
var count = 0;

var server = http.createServer(function(req, res) {
  var timeoutId;
  assert.equal('POST', req.method);
  req.pause();
  common.error('request paused');

  setTimeout(function() {
    req.resume();
    common.error('request resumed');
  }, 1000);

  req.setEncoding('utf8');
  req.addListener('data', function(chunk) {
    common.error('recv data! nchars = ' + chunk.length);
    buffer += chunk;
  });

  req.addListener('end', function() {
    if (timeoutId) {
      clearTimeout(timeoutId);
    }
    console.log('request complete from server');
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end();
  });
});
server.listen(common.PORT);

server.addListener('listening', function() {
  var req = http.request({
    port: common.PORT,
    path: '/',
    method: 'POST'
  });

  common.error('pump!');
  util.pump(fs.createReadStream(fn), req, function(err) {
    if (err) {
      throw err;
    }
    client_req_complete = true;
    common.error('client finished sending request');
  });

  req.addListener('response', function(res) {
    res.addListener('end', function() {
      server.close();
    });
  });
});

process.addListener('exit', function() {
  assert.equal(expected, buffer);
  assert.ok(client_req_complete);
});