Update RowOctet tests

src/ImageSharp/Formats/Jpeg/Components/RowOctet.cs

@@ -24,21 +24,6 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components
         private Span<T> row6;
         private Span<T> row7;
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public RowOctet(Buffer2D<T> buffer, int startY)
-        {
-            int y = startY;
-            int height = buffer.Height;
-            this.row0 = y < height ? buffer.GetRowSpan(y++) : default;
-            this.row1 = y < height ? buffer.GetRowSpan(y++) : default;
-            this.row2 = y < height ? buffer.GetRowSpan(y++) : default;
-            this.row3 = y < height ? buffer.GetRowSpan(y++) : default;
-            this.row4 = y < height ? buffer.GetRowSpan(y++) : default;
-            this.row5 = y < height ? buffer.GetRowSpan(y++) : default;
-            this.row6 = y < height ? buffer.GetRowSpan(y++) : default;
-            this.row7 = y < height ? buffer.GetRowSpan(y) : default;
-        }
-
         // No unsafe tricks, since Span<T> can't be used as a generic argument
         public Span<T> this[int y]
         {

tests/ImageSharp.Tests/Formats/Jpg/GenericBlock8x8Tests.cs

@@ -42,7 +42,8 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             using (Image<TPixel> s = provider.GetImage())
             {
                 var d = default(GenericBlock8x8<TPixel>);
-                var rowOctet = new RowOctet<TPixel>(s.GetRootFramePixelBuffer(), 0);
+                RowOctet<TPixel> rowOctet = default;
+                rowOctet.Update(s.GetRootFramePixelBuffer(), 0);
                 d.LoadAndStretchEdges(s.Frames.RootFrame.PixelBuffer, 0, 0, ref rowOctet);
 
                 TPixel a = s.Frames.RootFrame[0, 0];
@@ -67,7 +68,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             using (Image<TPixel> s = provider.GetImage())
             {
                 var d = default(GenericBlock8x8<TPixel>);
-                var rowOctet = new RowOctet<TPixel>(s.GetRootFramePixelBuffer(), 7);
+                RowOctet<TPixel> rowOctet = default;
+                rowOctet.Update(s.GetRootFramePixelBuffer(), 7);
+
                 d.LoadAndStretchEdges(s.Frames.RootFrame.PixelBuffer, 6, 7, ref rowOctet);
 
                 Assert.Equal(s[6, 7], d[0, 0]);