QtWebEngine: Implement webelem.classes

qutebrowser/browser/webengine/webengineelem.py

@@ -71,8 +71,7 @@ class WebEngineElement(webelem.AbstractWebElement):
 
     def classes(self):
         """Get a list of classes assigned to this element."""
-        log.stub()
-        return []
+        return self._js_dict['class_name'].split()
 
     def tag_name(self):
         """Get the tag name of this element.

qutebrowser/javascript/webelem.js

@@ -36,6 +36,7 @@ window._qutebrowser.webelem = (function() {
             "text": elem.text,
             "tag_name": elem.tagName,
             "outer_xml": elem.outerHTML,
+            "class_name": elem.className,
             "rects": [],  // Gets filled up later
         };
 

tests/end2end/features/hints.feature

@@ -139,7 +139,6 @@ Feature: Using hints
         # The actual check is already done above
         Then no crash should happen
 
-    @qtwebengine_todo: webelem.classes is not implemented yet
     Scenario: Hinting with ACE editor
         When I open data/hints/ace/ace.html
         And I hint with args "inputs" and follow a