fix(data): do not use data object in our unit tests

js/src/carousel.js

@@ -579,6 +579,10 @@ class Carousel {
 
     event.preventDefault()
   }
+
+  static _getInstance(element) {
+    return Data.getData(element, DATA_KEY)
+  }
 }
 
 /**
@@ -597,7 +601,6 @@ EventHandler.on(window, Event.LOAD_DATA_API, () => {
   }
 })
 
-
 /**
  * ------------------------------------------------------------------------
  * jQuery