old_contents: 'use strict';
  
  var _ = require('lodash');
  var test = require('tape');
  var sum = require('./');
  
  test('creates unique hashes', function (t) {
    var results = [];
    sub([0,1,2,3]);
    sub({url:12});
    sub({headers:12});
    sub({headers:122});
    sub({headers:'122'});
    sub({headers:{accept:'text/plain'}});
    sub({payload:[0,1,2,3],headers:[{a:'b'}]});
    sub({a:function () {}});
    sub({b:function () {}});
    sub({b:function (a) {}});
    sub(function () {});
    sub(function (a) {});
    sub(function (b) {});
    sub(function (a) { return a;});
    sub(function (a) {return a;});
    sub('');
    sub('null');
    sub('false');
    sub('true');
    sub('0');
    sub('1');
    sub('void 0');
    sub('undefined');
    sub(null);
    sub(false);
    sub(true);
    sub(0);
    sub(1);
    sub(void 0);
    sub({});
    sub({a:{},b:{}});
    sub([]);
    sub(new Date());
    sub(global, 'global');
    t.equal(results.length, _.uniq(results).length);
    t.end();
  
    function sub (value, name) {
      var hash = sum(value);
      results.push(hash);
      console.log('%s from:', hash, name || value);
    }
  });
  
  test('hashes clash if same properties', function (t) {
    equals({a:'1'},{a:'1'});
    equals({a:'1',b:1},{b:1,a:'1'});
    t.end();
  
    function equals (a, b) {
      t.equal(sum(a), sum(b));
    }
  });
  
new_contents: 'use strict';
  
  var _ = require('lodash');
  var test = require('tape');
  var sum = require('./');
  
  test('creates unique hashes', function (t) {
    var results = [];
    sub([0,1,2,3]);
    sub({0:0,1:1,2:2,3:3});
    sub({0:0,1:1,2:2,3:3,length:4});
    sub({url:12});
    sub({headers:12});
    sub({headers:122});
    sub({headers:'122'});
    sub({headers:{accept:'text/plain'}});
    sub({payload:[0,1,2,3],headers:[{a:'b'}]});
    sub({a:function () {}});
    sub({b:function () {}});
    sub({b:function (a) {}});
    sub(function () {});
    sub(function (a) {});
    sub(function (b) {});
    sub(function (a) { return a;});
    sub(function (a) {return a;});
    sub('');
    sub('null');
    sub('false');
    sub('true');
    sub('0');
    sub('1');
    sub('void 0');
    sub('undefined');
    sub(null);
    sub(false);
    sub(true);
    sub(0);
    sub(1);
    sub(void 0);
    sub({});
    sub({a:{},b:{}});
    sub([]);
    sub(new Date());
    sub(global, 'global');
    t.equal(results.length, _.uniq(results).length);
    t.end();
  
    function sub (value, name) {
      var hash = sum(value);
      results.push(hash);
      console.log('%s from:', hash, name || value);
    }
  });
  
  test('hashes clash if same properties', function (t) {
    equals(function () {}, function () {});
    equals(function (a) {}, function (a) {});
    equals({a:'1'},{a:'1'});
    equals({a:'1',b:1},{b:1,a:'1'});
    t.end();
  
    function equals (a, b) {
      t.equal(sum(a), sum(b));
    }
  });
  
subject: add more test show/cases