Add debug logging to video tests

common/test/acceptance/pages/lms/video/video.py

@@ -9,6 +9,8 @@ from bok_choy.page_object import PageObject
 from bok_choy.promise import EmptyPromise, Promise
 from bok_choy.javascript import wait_for_js, js_defined
 
+import logging
+log = logging.getLogger('VideoPage')
 
 VIDEO_BUTTONS = {
     'CC': '.hide-subtitles',
@@ -661,6 +663,11 @@ class VideoPage(PageObject):
         state_selector = self.get_element_selector(CSS_CLASS_NAMES['video_container'])
         current_state = self.q(css=state_selector).attrs('class')[0]
 
+        # For troubleshooting purposes show what the current state is.
+        # The debug statements will only be displayed in the event of a failure.
+        logging.debug("Current state of '{}' element is '{}'".format(state_selector, current_state))
+
+        # See the JS video player's onStateChange function
         if 'is-playing' in current_state:
             return 'playing'
         elif 'is-paused' in current_state: