S3Upload little fix

Author: krivchenko-kv

src/Storage/S3Upload.cs

@@ -14,8 +14,10 @@ public sealed class S3Upload : IDisposable
 	private byte[]? _byteBuffer;
 	private bool _disposed;
 	private int _partCount;
+	private readonly IArrayPool _arrayPool;
 	private string[] _parts;
 
+
 	internal S3Upload(S3BucketClient client, string fileName, string encodedFileName, string uploadId)
 	{
 		FileName = fileName;
@@ -24,7 +26,8 @@ internal S3Upload(S3BucketClient client, string fileName, string encodedFileName
 		_client = client;
 		_encodedFileName = encodedFileName;
 
-		_parts = DefaultArrayPool.Instance.Rent<string>(16);
+		_arrayPool = DefaultArrayPool.Instance;
+		_parts = _arrayPool.Rent<string>(16);
 	}
 
 	/// <summary>
@@ -125,7 +128,7 @@ public async Task<bool> AddPart(byte[] data, int length, CancellationToken ct)
 	/// <returns>Возвращает результат загрузки</returns>
 	public async Task<bool> AddParts(Stream data, CancellationToken ct)
 	{
-		_byteBuffer ??= DefaultArrayPool.Instance.Rent<byte>(S3BucketClient.DefaultPartSize);
+		_byteBuffer ??= _arrayPool.Rent<byte>(S3BucketClient.DefaultPartSize);
 
 		while (true)
 		{
@@ -197,12 +200,12 @@ public void Dispose()
 		}
 
 		Array.Clear(_parts, 0, _partCount);
-		DefaultArrayPool.Instance.Return(_parts);
+		_arrayPool.Return(_parts);
 		_parts = null!;
 
 		if (_byteBuffer is not null)
 		{
-			DefaultArrayPool.Instance.Return(_byteBuffer);
+			_arrayPool.Return(_byteBuffer);
 			_byteBuffer = null;
 		}