def test_cache_across_clients(self):
"""Show that caching is accessible across all clients
(i.e. that different clients don't generate different cache keys)"""
# Get a random video id
n_videos = len(self.video_cache)
video_id = random.choice(self.video_cache.keys())
sys.stdout.write("Testing on video_id = %s\n" % video_id)
video_path = self.video_cache[video_id][0]['path']
# Clean the cache for this item
caching.expire_page(path=video_path, failure_ok=True)
self.assertTrue(not caching.has_cache_key(path=video_path), "expect: No cache key after expiring the page")
# Set up the cache with Django client
Client().get(video_path)
self.assertTrue(caching.has_cache_key(path=video_path), "expect: Cache key exists after Django Client get")
caching.expire_page(path=video_path) # clean cache
self.assertTrue(not caching.has_cache_key(path=video_path), "expect: No cache key after expiring the page")
# Get the same cache key when getting with urllib, and make sure the cache is created again
urllib.urlopen(self.live_server_url + video_path).close()
self.assertTrue(caching.has_cache_key(path=video_path), "expect: Cache key exists after urllib get")
caching.expire_page(path=video_path) # clean cache
self.assertTrue(not caching.has_cache_key(path=video_path), "expect: No cache key after expiring the page")
# Same deal, now using requests library
requests.get(self.live_server_url + video_path)
self.assertTrue(caching.has_cache_key(path=video_path), "expect: Cache key exists after requestsget")
caching.expire_page(path=video_path) # clean cache
self.assertTrue(not caching.has_cache_key(path=video_path), "expect: No cache key after expiring the page")
def show_cache(self, force=False):
"""Go through each cacheable page, and show which are cached and which are NOT"""
for node_type in ['Topic', 'Video', 'Exercise']:
self.stdout.write("Cached %ss:\n" % node_type)
for narr in topic_tools.get_node_cache(node_type).values():
for n in narr:
if caching.has_cache_key(path=n["path"]):
self.stdout.write("\t%s\n" % n["path"])
def test_video_deleted_with_cache(self):
"""
Run videoscan to create cache items, then re-run to verify that the cache is cleared.
"""
out = call_command("videoscan", auto_cache=True)
cached_paths = caching.get_video_page_paths(video_id=self.video_id)
for path in cached_paths:
self.assertTrue(caching.has_cache_key(path), "Check that cache has path %s" % path)
self.assertTrue(os.path.exists(self.fake_video_file), "Check that video file exists.")
# Remove the video
os.remove(self.fake_video_file)
self.assertFalse(os.path.exists(self.fake_video_file), "Check that video file no longer exists.")
# Call videoscan, and validate.
out = call_command("videoscan")
self.assertEqual(VideoFile.objects.all().count(), 0, "Make sure there are now no VideoFile objects.")
for path in cached_paths:
self.assertFalse(caching.has_cache_key(path), "Check that cache does NOT have path %s" % path)
def test_cache_invalidation(self):
"""Create the cache item, then invalidate it and show that it is deleted."""
# Get a random video id
n_videos = len(self.video_cache)
video_id = self.video_cache.keys()[10]#random.choice(self.video_cache.keys())
sys.stdout.write("Testing on video_id = %s\n" % video_id)
video_path = self.video_cache[video_id][0]['path']
# Clean the cache for this item
caching.expire_page(path=video_path, failure_ok=True)
# Create the cache item, and check it
self.assertTrue(not caching.has_cache_key(path=video_path), "expect: no cache key after expiring the page")
caching.regenerate_all_pages_related_to_videos(video_ids=[video_id])
self.assertTrue(caching.has_cache_key(path=video_path), "expect: Cache key exists after Django Client get")
# Invalidate the cache item, and check it
caching.invalidate_all_caches() # test the convenience function
self.assertTrue(not caching.has_cache_key(path=video_path), "expect: no cache key after expiring the page")
def test_video_added_with_cache(self):
"""
Add a video in the filesystem, call videoscan to create the videofile object and cache items
"""
# Call videoscan, and validate.
out = call_command("videoscan", auto_cache=True)
self.assertEqual(VideoFile.objects.all().count(), 1, "Make sure there is now one VideoFile object.")
self.assertEqual(VideoFile.objects.all()[0].youtube_id, self.youtube_id, "Make sure the video is the one we created.")
self.assertTrue(self.get_num_cache_entries() > 0, "Check that cache is not empty.")
cached_paths = caching.get_video_page_paths(video_id=self.video_id)
for path in cached_paths:
self.assertTrue(caching.has_cache_key(path), "Check that cache has path %s" % path)
def create_page_cache(self, path, force=False):
"""Go through each cacheable page, and either:
(a) Cache each page that is not
or
(b) Kill and regenerate each page"""
if force:
if caching.has_cache_key(path=path):
caching.expire_page(path=path)
self.stdout.write("[Redo]\t%s\n" % path)
else:
self.stdout.write("[Miss]\t%s\n" % path)
caching.create_cache(path=path)
else:
if not caching.has_cache_key(path=path):
caching.create_cache(path=path)
self.stdout.write("[Miss]\t%s\n" % path)
if not caching.has_cache_key(path=path):
# should never get here!
self.stdout.write("%s%s\n" % ("?"*10, path))