mjackson/mach

var assert = require('assert');
var expect = require('expect');
var callApp = require('../../utils/callApp');
var logger = require('../logger');

function zeroLength() {
  return {
    headers: { 'Content-Length': 0 }
  };
}

describe('middleware/logger', function () {
  describe('when a response has Content-Length of 100', function () {
    var messages, messageHandler;
    beforeEach(function () {
      messages = [];
      messageHandler = function (message) {
        messages.push(message);
      };
    });

    it('logs a content length of 0', function () {
      return callApp(logger(zeroLength, messageHandler)).then(function (conn) {
        assert(messages[0]);

        var match = messages[0].match(/\b(\d+) ([0-9\.]+)\b$/);
        assert(match);

        var contentLength = match[1];
        expect(contentLength).toEqual('0');
      });
    });
  });
});