Add test for #2057

Author: brianpopow

tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Metadata.cs

@@ -4,7 +4,6 @@
 using System;
 using System.IO;
 using System.Runtime.CompilerServices;
-using System.Text;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Jpeg;
 using SixLabors.ImageSharp.Metadata;

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

@@ -21,7 +21,7 @@
 namespace SixLabors.ImageSharp.Tests.Formats.Jpg
 {
     // TODO: Scatter test cases into multiple test classes
-     [Trait("Format", "Jpg")]
+    [Trait("Format", "Jpg")]
     public partial class JpegDecoderTests
     {
         public const PixelTypes CommonNonDefaultPixelTypes = PixelTypes.Rgba32 | PixelTypes.Argb32 | PixelTypes.Bgr24 | PixelTypes.RgbaVector;
@@ -65,7 +65,7 @@ private static bool SkipTest(ITestImageProvider provider)
 
         private ITestOutputHelper Output { get; }
 
-        private static JpegDecoder JpegDecoder => new JpegDecoder();
+        private static JpegDecoder JpegDecoder => new();
 
         [Fact]
         public void ParseStream_BasicPropertiesAreCorrect()
@@ -213,6 +213,19 @@ public void Issue1732_DecodesWithRgbColorSpace<TPixel>(TestImageProvider<TPixel>
             }
         }
 
+        // https://github.com/SixLabors/ImageSharp/issues/2057
+        [Theory]
+        [WithFile(TestImages.Jpeg.Issues.Issue2057App1Parsing, PixelTypes.Rgba32)]
+        public void Issue2057_DecodeWorks<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : unmanaged, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(JpegDecoder))
+            {
+                image.DebugSave(provider);
+                image.CompareToOriginal(provider);
+            }
+        }
+
         // DEBUG ONLY!
         // The PDF.js output should be saved by "tests\ImageSharp.Tests\Formats\Jpg\pdfjs\jpeg-converter.htm"
         // into "\tests\Images\ActualOutput\JpegDecoderTests\"

tests/ImageSharp.Tests/TestImages.cs

@@ -262,6 +262,7 @@ public static class Issues
                 public const string MalformedUnsupportedComponentCount = "Jpg/issues/issue-1900-malformed-unsupported-255-components.jpg";
                 public const string MultipleApp01932 = "Jpg/issues/issue-1932-app0-resolution.jpg";
                 public const string InvalidIptcTag = "Jpg/issues/Issue1942InvalidIptcTag.jpg";
+                public const string Issue2057App1Parsing = "Jpg/issues/Issue2057-App1Parsing.jpg";
 
                 public static class Fuzz
                 {