Fixed: Don't use folder quality when it is unknown and file quality is

Closes #560

src/NzbDrone.Core.Test/MediaFiles/EpisodeImport/ImportDecisionMakerFixture.cs

@@ -345,5 +345,23 @@ namespace NzbDrone.Core.Test.MediaFiles.EpisodeImport
             Mocker.GetMock<IParsingService>()
                   .Verify(c => c.GetLocalEpisode(It.IsAny<string>(), It.IsAny<Series>(), It.Is<ParsedEpisodeInfo>(p => p != null), true), Times.Never());
         }
+
+        [Test]
+        public void should_not_use_folder_quality_when_it_is_unknown()
+        {
+            GivenSpecifications(_pass1, _pass2, _pass3);
+
+            _series.Profile = new Profile
+                              {
+                                  Items = Qualities.QualityFixture.GetDefaultQualities(Quality.DVD, Quality.Unknown)
+                              };
+
+
+            var folderQuality = new QualityModel(Quality.Unknown);
+
+            var result = Subject.GetImportDecisions(_videoFiles, _series, new ParsedEpisodeInfo { Quality = folderQuality}, true);
+
+            result.Single().LocalEpisode.Quality.Should().Be(_quality);
+        }
     }
 }

src/NzbDrone.Core/MediaFiles/EpisodeImport/ImportDecisionMaker.cs

@@ -182,8 +182,8 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport
         private QualityModel GetQuality(ParsedEpisodeInfo folderInfo, QualityModel fileQuality, Series series)
         {
             if (folderInfo != null &&
-                            new QualityModelComparer(series.Profile).Compare(folderInfo.Quality,
-                                fileQuality) > 0)
+                folderInfo.Quality.Quality != Quality.Unknown && 
+                new QualityModelComparer(series.Profile).Compare(folderInfo.Quality, fileQuality) > 0)
             {
                 _logger.Debug("Using quality from folder: {0}", folderInfo.Quality);
                 return folderInfo.Quality;