added assertion to sitenav test

misago/emberapp/tests/unit/controllers/site-nav-test.js

@@ -6,6 +6,8 @@ import {
 moduleFor('controller:site-nav', 'SiteNavController');
 
 test('it exists', function(assert) {
+  assert.expect(1);
+
   var controller = this.subject();
   assert.ok(controller);
 });