Add Hogfather.Create() factory.

static/test.js

@@ -947,7 +947,7 @@ QUnit.asyncTest('sendMessage admin ACL', function(assert) {
 
 QUnit.module('Hogfather');
 
-QUnit.asyncTest('Construct/shutdown', function(assert) {
+QUnit.test('Construct/shutdown', function(assert) {
   assert.expect(4);
 
   var cosmo = new Cosmopolite(null, randstring());
@@ -956,7 +956,24 @@ QUnit.asyncTest('Construct/shutdown', function(assert) {
   var hogfather = new Hogfather(cosmo, randstring());
   assert.ok(true, 'new Hogfather()) succeeds');
 
-  window.setTimeout(function() {
+  hogfather.shutdown();
+  assert.ok(true, 'Hogfather.shutdown() succeeds');
+
+  cosmo.shutdown();
+  assert.ok(true, 'Cosmopolite.shutdown() succeeds');
+});
+
+QUnit.asyncTest('Create', function(assert) {
+  assert.expect(5);
+
+  var cosmo = new Cosmopolite(null, randstring());
+  assert.ok(true, 'new Cosmopolite() succeeds');
+
+  Hogfather.Create(cosmo).then(function(hogfather) {
+    assert.ok(true, 'Hogfather.Create() succeeds');
+
+    assert.ok(hogfather, 'Hogfather.Create() returns something');
+
     hogfather.shutdown();
     assert.ok(true, 'Hogfather.shutdown() succeeds');
 
@@ -964,6 +981,5 @@ QUnit.asyncTest('Construct/shutdown', function(assert) {
     assert.ok(true, 'Cosmopolite.shutdown() succeeds');
 
     QUnit.start();
-  }, 10 * 1000);
-
+  });
 });