WIP: 单元测试

Reviewing AudioMetadataReader.cs

src/Core/AudioFileScanner.cs

@@ -5,10 +5,10 @@ namespace OCES.Resonance.Core;
 /// </summary>
 public class AudioFileScanner
 {
-    private static readonly string[] SupportedExtensions = 
-    { 
-        ".wav", ".mp3", ".flac", ".aiff", ".aif", ".m4a", ".ogg", ".wma", ".bwf", ".wav64" 
-    };
+    static readonly string[] SupportedExtensions =
+    [
+        ".wav", ".mp3", ".flac", ".aiff", ".aif", ".m4a", ".ogg", ".wma", ".bwf", ".wav64",
+    ];
 
     /// <summary>
     /// 扫描指定目录，返回所有音频文件路径
@@ -23,12 +23,11 @@ public class AudioFileScanner
             throw new DirectoryNotFoundException($"目录不存在：{directoryPath}");
         }
 
-        var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
-        
+        SearchOption searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
+
         return SupportedExtensions
             .SelectMany(ext => Directory.EnumerateFiles(directoryPath, $"*{ext}", searchOption))
-            .Where(IsSupportedAudioFile)
-            .Distinct(StringComparer.OrdinalIgnoreCase);
+            .Where(IsSupportedAudioFile);
     }
 
     /// <summary>