Improved tests

2 files changed, 12 insertions, 6 deletions

diff --git a/Emby.Naming/Audio/AlbumParser.cs b/Emby.Naming/Audio/AlbumParser.cs
index 33f4468d9..23ff8c3fa 100644
--- a/Emby.Naming/Audio/AlbumParser.cs
+++ b/Emby.Naming/Audio/AlbumParser.cs
@@ -1,3 +1,4 @@
+#nullable enable
 #pragma warning disable CS1591
 
 using System;
@@ -22,7 +23,7 @@ namespace Emby.Naming.Audio
         {
             var filename = Path.GetFileName(path);
 
-            if (string.IsNullOrEmpty(filename))
+            if (path.Length == 0)
             {
                 return false;
             }
@@ -39,18 +40,22 @@ namespace Emby.Naming.Audio
             filename = filename.Replace(')', ' ');
             filename = Regex.Replace(filename, @"\s+", " ");
 
-            filename = filename.TrimStart();
+            ReadOnlySpan<char> trimmedFilename = filename.TrimStart();
 
             foreach (var prefix in _options.AlbumStackingPrefixes)
             {
-                if (filename.IndexOf(prefix, StringComparison.OrdinalIgnoreCase) != 0)
+                if (!trimmedFilename.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
                 {
                     continue;
                 }
 
-                var tmp = filename.Substring(prefix.Length);
+                var tmp = trimmedFilename.Slice(prefix.Length).Trim();
 
-                tmp = tmp.Trim().Split(' ').FirstOrDefault() ?? string.Empty;
+                int index = tmp.IndexOf(' ');
+                if (index != -1)
+                {
+                    tmp = tmp.Slice(0, index);
+                }
 
                 if (int.TryParse(tmp, NumberStyles.Integer, CultureInfo.InvariantCulture, out _))
                 {
diff --git a/Emby.Naming/Audio/AudioFileParser.cs b/Emby.Naming/Audio/AudioFileParser.cs
index 25d5f8735..6b2f4be93 100644
--- a/Emby.Naming/Audio/AudioFileParser.cs
+++ b/Emby.Naming/Audio/AudioFileParser.cs
@@ -1,3 +1,4 @@
+#nullable enable
 #pragma warning disable CS1591
 
 using System;
@@ -11,7 +12,7 @@ namespace Emby.Naming.Audio
     {
         public static bool IsAudioFile(string path, NamingOptions options)
         {
-            var extension = Path.GetExtension(path) ?? string.Empty;
+            var extension = Path.GetExtension(path);
             return options.AudioFileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase);
         }
     }