fix playlist pagination and add YT playlist tests (closes #569)

3 files changed, 89 insertions, 10 deletions

diff --git a/test/test_youtube_lists.py b/test/test_youtube_lists.py
new file mode 100644
index 000000000..a11a59ed7
--- /dev/null
+++ b/test/test_youtube_lists.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+
+import sys
+import unittest
+import socket
+
+# Allow direct execution
+import os
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from youtube_dl.InfoExtractors import YoutubePlaylistIE
+from youtube_dl.utils import *
+
+# General configuration (from __init__, not very elegant...)
+jar = compat_cookiejar.CookieJar()
+cookie_processor = compat_urllib_request.HTTPCookieProcessor(jar)
+proxy_handler = compat_urllib_request.ProxyHandler()
+opener = compat_urllib_request.build_opener(proxy_handler, cookie_processor, YoutubeDLHandler())
+compat_urllib_request.install_opener(opener)
+socket.setdefaulttimeout(300) # 5 minutes should be enough (famous last words)
+
+class FakeDownloader(object):
+    def __init__(self):
+        self.result = []
+        self.params = {}
+    def to_screen(self, s):
+        print(s)
+    def trouble(self, s):
+        raise Exception(s)
+    def download(self, x):
+        self.result.append(x)
+
+class TestYoutubeLists(unittest.TestCase):
+    def test_youtube_playlist(self):
+        DL = FakeDownloader()
+        IE = YoutubePlaylistIE(DL)
+        IE.extract('https://www.youtube.com/playlist?list=PLwiyx1dc3P2JR9N8gQaQN_BCvlSlap7re')
+        self.assertEqual(DL.result, [
+            ['http://www.youtube.com/watch?v=bV9L5Ht9LgY'],
+            ['http://www.youtube.com/watch?v=FXxLjLQi3Fg'],
+            ['http://www.youtube.com/watch?v=tU3Bgo5qJZE']
+        ])
+
+    def test_youtube_playlist_long(self):
+        DL = FakeDownloader()
+        IE = YoutubePlaylistIE(DL)
+        IE.extract('https://www.youtube.com/playlist?list=UUBABnxM4Ar9ten8Mdjj1j0Q')
+        self.assertTrue(len(DL.result) >= 799)
+
+    def test_youtube_course(self):
+        DL = FakeDownloader()
+        IE = YoutubePlaylistIE(DL)
+        # TODO find a > 100 (paginating?) videos course
+        IE.extract('https://www.youtube.com/course?list=ECUl4u3cNGP61MdtwGTqZA0MreSaDybji8')
+        self.assertEqual(DL.result[0], ['http://www.youtube.com/watch?v=j9WZyLZCBzs'])
+        self.assertEqual(len(DL.result), 25)
+        self.assertEqual(DL.result[-1], ['http://www.youtube.com/watch?v=rYefUsYuEp0'])
+
+    def test_youtube_channel(self):
+        """I give up, please find a channel that does paginate and test this like test_youtube_playlist_long"""
+        pass # TODO
+
+    def test_youtube_user(self):
+        DL = FakeDownloader()
+        IE = YoutubePlaylistIE(DL)
+        IE.extract('https://www.youtube.com/user/TheLinuxFoundation')
+        self.assertTrue(len(DL.result) >= 320)
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/test/test_youtube_playlist_ids.py b/test/test_youtube_playlist_ids.py
index b4dcedb45..2eeb3216c 100644
--- a/test/test_youtube_playlist_ids.py
+++ b/test/test_youtube_playlist_ids.py
@@ -11,12 +11,12 @@ from youtube_dl.InfoExtractors import YoutubeIE, YoutubePlaylistIE
 
 class TestYoutubePlaylistMatching(unittest.TestCase):
     def test_playlist_matching(self):
-        assert YoutubePlaylistIE().suitable(u'ECUl4u3cNGP61MdtwGTqZA0MreSaDybji8')
-        assert YoutubePlaylistIE().suitable(u'PL63F0C78739B09958')
-        assert not YoutubePlaylistIE().suitable(u'PLtS2H6bU1M')
+        self.assertTrue(YoutubePlaylistIE().suitable(u'ECUl4u3cNGP61MdtwGTqZA0MreSaDybji8'))
+        self.assertTrue(YoutubePlaylistIE().suitable(u'PL63F0C78739B09958'))
+        self.assertFalse(YoutubePlaylistIE().suitable(u'PLtS2H6bU1M'))
 
     def test_youtube_matching(self):
-        assert YoutubeIE().suitable(u'PLtS2H6bU1M')
+        self.assertTrue(YoutubeIE().suitable(u'PLtS2H6bU1M'))
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/youtube_dl/InfoExtractors.py b/youtube_dl/InfoExtractors.py
index 9cfff153b..5ebe64b6e 100644
--- a/youtube_dl/InfoExtractors.py
+++ b/youtube_dl/InfoExtractors.py
@@ -1674,7 +1674,7 @@ class YoutubePlaylistIE(InfoExtractor):
     _VALID_URL = r'(?:(?:https?://)?(?:\w+\.)?youtube\.com/(?:(?:course|view_play_list|my_playlists|artist|playlist)\?.*?(p|a|list)=|user/.*?/user/|p/|user/.*?#[pg]/c/)(?:PL|EC)?|PL|EC)([0-9A-Za-z-_]{10,})(?:/.*?/([0-9A-Za-z_-]+))?.*'
     _TEMPLATE_URL = 'http://www.youtube.com/%s?%s=%s&page=%s&gl=US&hl=en'
     _VIDEO_INDICATOR_TEMPLATE = r'/watch\?v=(.+?)&([^&"]+&)*list=.*?%s'
-    _MORE_PAGES_INDICATOR = r'yt-uix-pager-next'
+    _MORE_PAGES_INDICATOR = u"Next \N{RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK}"
     IE_NAME = u'youtube:playlist'
 
     def __init__(self, downloader=None):
@@ -1713,7 +1713,7 @@ class YoutubePlaylistIE(InfoExtractor):
             url = self._TEMPLATE_URL % (playlist_access, playlist_prefix, playlist_id, pagenum)
             request = compat_urllib_request.Request(url)
             try:
-                page = compat_urllib_request.urlopen(request).read()
+                page = compat_urllib_request.urlopen(request).read().decode('utf8')
             except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
                 self._downloader.trouble(u'ERROR: unable to download webpage: %s' % compat_str(err))
                 return
@@ -1725,10 +1725,12 @@ class YoutubePlaylistIE(InfoExtractor):
                     ids_in_page.append(mobj.group(1))
             video_ids.extend(ids_in_page)
 
-            if re.search(self._MORE_PAGES_INDICATOR, page) is None:
+            if self._MORE_PAGES_INDICATOR not in page:
                 break
             pagenum = pagenum + 1
 
+        total = len(video_ids)
+
         playliststart = self._downloader.params.get('playliststart', 1) - 1
         playlistend = self._downloader.params.get('playlistend', -1)
         if playlistend == -1:
@@ -1736,6 +1738,11 @@ class YoutubePlaylistIE(InfoExtractor):
         else:
             video_ids = video_ids[playliststart:playlistend]
 
+        if len(video_ids) == total:
+            self._downloader.to_screen(u'[youtube] PL %s: Found %i videos' % (playlist_id, total))
+        else:
+            self._downloader.to_screen(u'[youtube] PL %s: Found %i videos, downloading %i' % (playlist_id, total, len(video_ids)))
+
         for id in video_ids:
             self._downloader.download(['http://www.youtube.com/watch?v=%s' % id])
         return
@@ -1746,7 +1753,7 @@ class YoutubeChannelIE(InfoExtractor):
 
     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)(?:/.*)?$"
     _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
-    _MORE_PAGES_INDICATOR = r'yt-uix-button-content">Next' # TODO
+    _MORE_PAGES_INDICATOR = u"Next \N{RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK}"
     IE_NAME = u'youtube:channel'
 
     def report_download_page(self, channel_id, pagenum):
@@ -1770,7 +1777,7 @@ class YoutubeChannelIE(InfoExtractor):
             url = self._TEMPLATE_URL % (channel_id, pagenum)
             request = compat_urllib_request.Request(url)
             try:
-                page = compat_urllib_request.urlopen(request).read()
+                page = compat_urllib_request.urlopen(request).read().decode('utf8')
             except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
                 self._downloader.trouble(u'ERROR: unable to download webpage: %s' % compat_str(err))
                 return
@@ -1782,10 +1789,12 @@ class YoutubeChannelIE(InfoExtractor):
                     ids_in_page.append(mobj.group(1))
             video_ids.extend(ids_in_page)
 
-            if re.search(self._MORE_PAGES_INDICATOR, page) is None:
+            if self._MORE_PAGES_INDICATOR not in page:
                 break
             pagenum = pagenum + 1
 
+        self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
+
         for id in video_ids:
             self._downloader.download(['http://www.youtube.com/watch?v=%s' % id])
         return