Fixed: Parsing some files that did not contain a series title

src/NzbDrone.Core.Test/ParserTests/SingleEpisodeParserFixture.cs

@@ -93,6 +93,9 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("[ www.Torrenting.com ] - Revolution.2012.S02E17.720p.HDTV.X264-DIMENSION", "Revolution2012", 2, 17)]
         [TestCase("Revolution.2012.S02E18.720p.HDTV.X264-DIMENSION.mkv", "Revolution2012", 2, 18)]
         [TestCase("Series - Season 1 - Episode 01 (Resolution).avi", "Series", 1, 1)]
+        [TestCase("5x09 - 100 [720p WEB-DL].mkv", "", 5, 9)]
+        [TestCase("1x03 - 274 [1080p BluRay].mkv", "", 1, 3)]
+        [TestCase("1x03 - The 112th Congress [1080p BluRay].mkv", "", 1, 3)]
         //[TestCase("", "", 0, 0)]
         public void should_parse_single_episode(string postTitle, string title, int seasonNumber, int episodeNumber)
         {

src/NzbDrone.Core/Parser/Parser.cs

@@ -22,6 +22,14 @@ namespace NzbDrone.Core.Parser
 //                new Regex(@"^(?:(?<absoluteepisode>\d{2,3})(?:_|-|\s|\.)+)+(?<title>.+?)(?:\W|_)+(?:S?(?<season>(?<!\d+)\d{1,2}(?!\d+))(?:(?:\-|[ex]|\W[ex]){1,2}(?<episode>\d{2}(?!\d+)))+)",
 //                          RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
+                //Multi-Part episodes without a title (S01E05.S01E06)
+                new Regex(@"^(?:\W*S?(?<season>(?<!\d+)(?:\d{1,2}|\d{4})(?!\d+))(?:(?:[ex]){1,2}(?<episode>\d{1,3}(?!\d+)))+){2,}",
+                          RegexOptions.IgnoreCase | RegexOptions.Compiled),
+
+                //Episodes without a title, Single (S01E05, 1x05) AND Multi (S01E04E05, 1x04x05, etc)
+                new Regex(@"^(?:S?(?<season>(?<!\d+)(?:\d{1,2}|\d{4})(?!\d+))(?:(?:\-|[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+)))+)",
+                          RegexOptions.IgnoreCase | RegexOptions.Compiled),
+
                 //Anime - [SubGroup] Title Absolute Episode Number + Season+Episode
                 new Regex(@"^(?:\[(?<subgroup>.+?)\](?:_|-|\s|\.)?)(?<title>.+?)(?:(?:\W|_)+(?<absoluteepisode>\d{2,3}))+(?:_|-|\s|\.)+(?:S?(?<season>(?<!\d+)\d{1,2}(?!\d+))(?:(?:\-|[ex]|\W[ex]){1,2}(?<episode>\d{2}(?!\d+)))+).*?(?<hash>\[.{8}\])?(?:$|\.)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
@@ -38,7 +46,7 @@ namespace NzbDrone.Core.Parser
                 new Regex(@"^\[(?<subgroup>.+?)\][-_. ]?(?<title>.+?)[-_. ]+(?:[-_. ]?(?<absoluteepisode>\d{2,}))+(?:[-_. ]+(?<special>special|ova|ovd))?.*?(?<hash>\[[a-z0-9]{8}\])?(?:$|\.mkv)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
-                //Anime - Title Absolute Episode Number [SubGroup] ***********
+                //Anime - Title Absolute Episode Number [SubGroup]
                 new Regex(@"^(?<title>.+?)(?:(?:_|-|\s|\.)+(?<absoluteepisode>\d{3}(?!\d+)))+(?:.+?)\[(?<subgroup>.+?)\].*?(?<hash>\[.{8}\])?(?:$|\.)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
@@ -46,18 +54,12 @@ namespace NzbDrone.Core.Parser
                 new Regex(@"^(?<title>.+?)(?:(?:_|-|\s|\.)+(?<absoluteepisode>\d{2,3}))+(?:[-_. ]+(?<special>special|ova|ovd))?.*?(?<hash>\[.{8}\])(?:$|\.)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
-                //Multi-Part episodes without a title (S01E05.S01E06)
-                new Regex(@"^(?:\W*S?(?<season>(?<!\d+)(?:\d{1,2}|\d{4})(?!\d+))(?:(?:[ex]){1,2}(?<episode>\d{1,3}(?!\d+)))+){2,}",
-                          RegexOptions.IgnoreCase | RegexOptions.Compiled),
+                
 
                 //Multi-episode Repeated (S01E05 - S01E06, 1x05 - 1x06, etc)
                 new Regex(@"^(?<title>.+?)(?:(\W|_)+S?(?<season>(?<!\d+)(?:\d{1,2}|\d{4})(?!\d+))(?:(?:[ex]){1,2}(?<episode>\d{1,3}(?!\d+)))+){2,}",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),
 
-                //Episodes without a title, Single (S01E05, 1x05) AND Multi (S01E04E05, 1x04x05, etc)
-                new Regex(@"^(?:S?(?<season>(?<!\d+)(?:\d{1,2}|\d{4})(?!\d+))(?:(?:\-|[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+)))+)",
-                          RegexOptions.IgnoreCase | RegexOptions.Compiled),
-
                 //Episodes with a title, Single episodes (S01E05, 1x05, etc) & Multi-episode (S01E05E06, S01E05-06, S01E05 E06, etc) **
                 new Regex(@"^(?<title>.+?)(?:(\W|_)+S?(?<season>(?<!\d+)(?:\d{1,2}|\d{4})(?!\d+))(?:[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+))(?:(?:\-|[ex]|\W[ex]|_){1,2}(?<episode>\d{2,3}(?!\d+)))*)\W?(?!\\)",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled),