fix on unit test

frontend-js/src/test/js/map/data/UserPreferences-test.js

@@ -21,7 +21,7 @@ describe('UserPreferences', function () {
       assert.ok(object.getElementValidAnnotations("lcsb.mapviewer.model.map.species.Protein").length > 0);
       assert.ok(object.getElementRequiredAnnotations("lcsb.mapviewer.model.map.species.Protein").requiredAtLeastOnce);
       assert.ok(object.getElementRequiredAnnotations("lcsb.mapviewer.model.map.species.Protein").list.length > 0);
-      assert.ok(0, logger.getWarnings().length);
+      assert.equal(0, logger.getWarnings().length);
     });
   });
 });