Don't clean common words from the start of the title

Fixed: Do not treat similar titles as the exact same

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

@@ -15,8 +15,6 @@ namespace NzbDrone.Core.Test.ParserTests
     public class NormalizeTitleFixture : CoreTest
     {
         [TestCase("Conan", "conan")]
-        [TestCase("The Tonight Show With Jay Leno", "tonightshowwithjayleno")]
-        [TestCase("The.Daily.Show", "dailyshow")]
         [TestCase("Castle (2009)", "castle2009")]
         [TestCase("Parenthood.2010", "parenthood2010")]
         [TestCase("Law_and_Order_SVU", "lawordersvu")]
@@ -51,9 +49,6 @@ namespace NzbDrone.Core.Test.ParserTests
                                 "word.{0}.word",
                                 "word {0} word",
                                 "word-{0}-word",
-                                "{0}.word.word",
-                                "{0}-word-word",
-                                "{0} word word",
                                 "word.word.{0}",
                                 "word-word-{0}",
                                 "word-word {0}",
@@ -64,7 +59,6 @@ namespace NzbDrone.Core.Test.ParserTests
                 var dirty = String.Format(s, word);
                 dirty.CleanSeriesTitle().Should().Be("wordword");
             }
-
         }
 
         [TestCase("the")]
@@ -92,5 +86,36 @@ namespace NzbDrone.Core.Test.ParserTests
             }
 
         }
+
+        [TestCase("The Office", "theoffice")]
+        [TestCase("The Tonight Show With Jay Leno", "thetonightshowwithjayleno")]
+        [TestCase("The.Daily.Show", "thedailyshow")]
+        public void should_not_remove_from_the_beginning_of_the_title(string parsedSeriesName, string seriesName)
+        {
+            var result = parsedSeriesName.CleanSeriesTitle();
+            result.Should().Be(seriesName);
+        }
+
+        [TestCase("the")]
+        [TestCase("and")]
+        [TestCase("or")]
+        [TestCase("a")]
+        [TestCase("an")]
+        [TestCase("of")]
+        public void should_not_clean_word_from_beginning_of_string(string word)
+        {
+            var dirtyFormat = new[]
+                            {
+                                "{0}.word.word",
+                                "{0}-word-word",
+                                "{0} word word"
+                            };
+
+            foreach (var s in dirtyFormat)
+            {
+                var dirty = String.Format(s, word);
+                dirty.CleanSeriesTitle().Should().Be(word + "wordword");
+            }
+        }
     }
 }

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

@@ -23,39 +23,6 @@ namespace NzbDrone.Core.Test.ParserTests
          * Superman.-.The.Man.of.Steel.1994-05.33.hybrid.DreamGirl-Novus-HD
          */
 
-        [TestCase("[SubDESU]_High_School_DxD_07_(1280x720_x264-AAC)_[6B7FD717]", "High School DxD", 7, 0, 0)]
-        [TestCase("[Chihiro]_Working!!_-_06_[848x480_H.264_AAC][859EEAFA]", "Working!!", 6, 0, 0)]
-        [TestCase("[Commie]_Senki_Zesshou_Symphogear_-_11_[65F220B4]", "Senki_Zesshou_Symphogear", 11, 0, 0)]
-        [TestCase("[Underwater]_Rinne_no_Lagrange_-_12_(720p)_[5C7BC4F9]", "Rinne_no_Lagrange", 12, 0, 0)]
-        [TestCase("[Commie]_Rinne_no_Lagrange_-_15_[E76552EA]", "Rinne_no_Lagrange", 15, 0, 0)]
-        [TestCase("[HorribleSubs]_Hunter_X_Hunter_-_33_[720p]", "Hunter_X_Hunter", 33, 0, 0)]
-        [TestCase("[HorribleSubs]_Fairy_Tail_-_145_[720p]", "Fairy_Tail", 145, 0, 0)]
-        [TestCase("[HorribleSubs] Tonari no Kaibutsu-kun - 13 [1080p].mkv", "Tonari no Kaibutsu-kun", 13, 0, 0)]
-        [TestCase("[Doremi].Yes.Pretty.Cure.5.Go.Go!.31.[1280x720].[C65D4B1F].mkv", "Yes.Pretty.Cure.5.Go.Go!", 31, 0, 0)]
-        [TestCase("[K-F] One Piece 214", "One Piece", 214, 0, 0)]
-        [TestCase("[K-F] One Piece S10E14 214", "One Piece", 214, 10, 14)]
-        [TestCase("[K-F] One Piece 10x14 214", "One Piece", 214, 10, 14)]
-        [TestCase("[K-F] One Piece 214 10x14", "One Piece", 214, 10, 14)]
-//        [TestCase("One Piece S10E14 214", "One Piece", 214, 10, 14)]
-//        [TestCase("One Piece 10x14 214", "One Piece", 214, 10, 14)]
-//        [TestCase("One Piece 214 10x14", "One Piece", 214, 10, 14)]
-//        [TestCase("214 One Piece 10x14", "One Piece", 214, 10, 14)]
-        [TestCase("Bleach - 031 - The Resolution to Kill [Lunar].avi", "Bleach", 31, 0, 0)]
-        [TestCase("Bleach - 031 - The Resolution to Kill [Lunar]", "Bleach", 31, 0, 0)]
-        [TestCase("[ACX]Hack Sign 01 Role Play [Kosaka] [9C57891E].mkv", "Hack Sign", 1, 0, 0)]
-        [TestCase("[SFW-sage] Bakuman S3 - 12 [720p][D07C91FC]", "Bakuman S3", 12, 0, 0)]
-        [TestCase("ducktales_e66_time_is_money_part_one_marking_time", "DuckTales", 66, 0, 0)]
-        public void parse_absolute_numbers(string postTitle, string title, int absoluteEpisodeNumber, int seasonNumber, int episodeNumber)
-        {
-            var result = Parser.Parser.ParseTitle(postTitle);
-            result.Should().NotBeNull();
-            result.AbsoluteEpisodeNumbers.First().Should().Be(absoluteEpisodeNumber);
-            result.SeasonNumber.Should().Be(seasonNumber);
-            result.EpisodeNumbers.FirstOrDefault().Should().Be(episodeNumber);
-            result.SeriesTitle.Should().Be(title.CleanSeriesTitle());
-            result.FullSeason.Should().BeFalse();
-        }
-
         [TestCase("Chuck - 4x05 - Title", "Chuck")]
         [TestCase("Law & Order - 4x05 - Title", "laworder")]
         [TestCase("Bad Format", "badformat")]

src/NzbDrone.Core/Parser/Parser.cs

@@ -100,7 +100,7 @@ namespace NzbDrone.Core.Parser
                     RegexOptions.IgnoreCase | RegexOptions.Compiled)
             };
 
-        private static readonly Regex NormalizeRegex = new Regex(@"((?:\b|_)(a|an|the|and|or|of)(?:\b|_))|\W|_",
+        private static readonly Regex NormalizeRegex = new Regex(@"((?:\b|_)(?<!^)(a|an|the|and|or|of)(?:\b|_))|\W|_",
                                                                  RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         private static readonly Regex SimpleTitleRegex = new Regex(@"480[i|p]|720[i|p]|1080[i|p]|[x|h|x\s|h\s]264|DD\W?5\W1|\<|\>|\?|\*|\:|\|",