Split tga alpha bits tests in 16 bit and 32 bit tests

tests/ImageSharp.Tests/Formats/Tga/TgaDecoderTests.cs

@@ -7,6 +7,7 @@ using SixLabors.ImageSharp.Formats.Tga;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Tests.TestUtilities;
+using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using Xunit;
 
 // ReSharper disable InconsistentNaming
@@ -199,11 +200,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Tga
         }
 
         [Theory]
-        [WithFile(NoAlphaBits32Bit, PixelTypes.Rgba32)]
         [WithFile(NoAlphaBits16Bit, PixelTypes.Rgba32)]
-        [WithFile(NoAlphaBits32BitRle, PixelTypes.Rgba32)]
         [WithFile(NoAlphaBits16BitRle, PixelTypes.Rgba32)]
-        public void TgaDecoder_CanDecode_WhenAlphaBitsNotSet<TPixel>(TestImageProvider<TPixel> provider)
+        public void TgaDecoder_CanDecode_WhenAlphaBitsNotSet_16Bit<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : unmanaged, IPixel<TPixel>
         {
             using (Image<TPixel> image = provider.GetImage(TgaDecoder))
@@ -213,6 +212,21 @@ namespace SixLabors.ImageSharp.Tests.Formats.Tga
             }
         }
 
+        [Theory]
+        [WithFile(NoAlphaBits32Bit, PixelTypes.Rgba32)]
+        [WithFile(NoAlphaBits32BitRle, PixelTypes.Rgba32)]
+        public void TgaDecoder_CanDecode_WhenAlphaBitsNotSet<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : unmanaged, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage(TgaDecoder))
+            {
+                // Using here the reference output instead of the the reference decoder,
+                // because the reference decoder does not ignore the alpha data here.
+                image.DebugSave(provider);
+                image.CompareToReferenceOutput(ImageComparer.Exact, provider);
+            }
+        }
+
         [Theory]
         [WithFile(Bit16, PixelTypes.Rgba32)]
         [WithFile(Bit24, PixelTypes.Rgba32)]

tests/ImageSharp.Tests/TestImages.cs

@@ -392,7 +392,7 @@ namespace SixLabors.ImageSharp.Tests
             public const string Bit24Pal = "Tga/targa_24bit_pal.tga";
             public const string NoAlphaBits16Bit = "Tga/16bit_noalphabits.tga";
             public const string NoAlphaBits16BitRle = "Tga/16bit_rle_noalphabits.tga";
-            public const string NoAlphaBits32Bit = "Tga/32bit_noalphabits.tga";
+            public const string NoAlphaBits32Bit = "Tga/32bit_no_alphabits.tga";
             public const string NoAlphaBits32BitRle = "Tga/32bit_rle_no_alphabits.tga";
         }
     }

tests/Images/External

@@ -1 +1 @@
-Subproject commit d809551931858cd3873bad49d2fe915fddff7a26
+Subproject commit 985e050aa7ac11830ae7a178ca2283f8b6307e4c