Add test image for decoding exr with float piyel type

tests/ImageSharp.Tests/Formats/Exr/ExrDecoderTests.cs

@@ -27,7 +27,17 @@ public class ExrDecoderTests
 
     [Theory]
     [WithFile(TestImages.Exr.Uncompressed, PixelTypes.Rgba32)]
-    public void ExrDecoder_CanDecode_Uncompressed_RGBA<TPixel>(TestImageProvider<TPixel> provider)
+    public void ExrDecoder_CanDecode_Uncompressed_Rgba_ExrPixelType_Half<TPixel>(TestImageProvider<TPixel> provider)
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        using Image<TPixel> image = provider.GetImage(ExrDecoder.Instance);
+        image.DebugSave(provider);
+        image.CompareToOriginal(provider, ReferenceDecoder);
+    }
+
+    [Theory]
+    [WithFile(TestImages.Exr.UncompressedFloatRgb, PixelTypes.Rgba32)]
+    public void ExrDecoder_CanDecode_Uncompressed_Rgb_ExrPixelType_Float<TPixel>(TestImageProvider<TPixel> provider)
         where TPixel : unmanaged, IPixel<TPixel>
     {
         using Image<TPixel> image = provider.GetImage(ExrDecoder.Instance);

tests/ImageSharp.Tests/TestImages.cs

@@ -1390,5 +1390,6 @@ public static class TestImages
         public const string B44 = "Exr/Calliphora_b44.exr";
         public const string Rgb = "Exr/Calliphora_rgb.exr";
         public const string Gray = "Exr/Calliphora_gray.exr";
+        public const string UncompressedFloatRgb = "Exr/rgb_float32_uncompressed.exr";
     }
 }

tests/Images/Input/Exr/rgb_float32_uncompressed.exr

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:67b2d2f5fdacbe5cb2341fe230737fde041321224cebd65d5d12245a4f02d554
+size 388342