Repair tests (without recomputing most of the cassettes)

subliminal/core.py

@@ -117,6 +117,8 @@ def list_subtitles_provider(self, provider, video, languages):
         except Exception as e:
             handle_exception(e, 'Provider {}'.format(provider))
 
+        return []
+
     def list_subtitles(self, video, languages):
         """List subtitles.
 

subliminal/subtitle.py

@@ -54,12 +54,12 @@ def __init__(self, language, hearing_impaired=False, page_link=None, encoding=No
     @property
     def id(self):
         """Unique identifier of the subtitle"""
-        raise NotImplementedError
+        return ""
 
     @property
     def info(self):
         """Info of the subtitle, human readable. Usually the subtitle name for GUI rendering"""
-        raise NotImplementedError
+        return ""
 
     @property
     def text(self):
@@ -94,12 +94,18 @@ def is_valid(self):
             return False
 
         try:
-            srt.parse(self.text)
+            self.parsed()
         except srt.SRTParseError:
             return False
 
         return True
 
+    def parsed(self):
+        """Text content parsed to a valid subtitle.
+
+        """
+        return srt.compose(srt.parse(self.text))
+
     def guess_encoding(self):
         """Guess encoding using the language, falling back on chardet.
 

subliminal/utils.py

@@ -6,7 +6,7 @@
 import re
 import socket
 import struct
-from datetime import datetime
+from datetime import datetime, timezone
 
 import requests
 from requests.exceptions import SSLError
@@ -154,14 +154,14 @@ def sanitize_release_group(string):
 
 
 def timestamp(date):
-    """Get the timestamp of the `date`, python2/3 compatible
+    """Get the timestamp of the `date` (with timezone).
 
     :param datetime.datetime date: the utc date.
     :return: the timestamp of the date.
     :rtype: float
 
     """
-    return (date - datetime(1970, 1, 1)).total_seconds()
+    return (date - datetime(1970, 1, 1, tzinfo=timezone.utc)).total_seconds()
 
 
 def matches_title(actual, title, alternative_titles):