加上纯色判断逻辑

Author: lindexi

src/MediaConverters/MediaConverters.Tests/Framework/TestHelper.cs

@@ -1,7 +1,9 @@
 using System.Diagnostics;
+
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.Formats.Png;
 using SixLabors.ImageSharp.PixelFormats;
+
 using TextVisionComparer;
 
 namespace DotNetCampus.MediaConverters.Tests;
@@ -41,10 +43,30 @@ public static FileInfo SaveAndCompareTestFile(this Image<Rgba32> image, string?
         return testFile;
     }
 
+    public static void AssertSolidBlackColorImage(this Image<Rgba32> image)
+        => image.AssertSolidColorImage(new Rgba32(0, 0, 0, 0xFF));
+    public static void AssertSolidWhiteColorImage(this Image<Rgba32> image)
+        => image.AssertSolidColorImage(new Rgba32(0xFF, 0xFF, 0xFF, 0xFF));
+
+    public static void AssertSolidColorImage(this Image<Rgba32> image, Rgba32 color)
+    {
+        image.ProcessPixelRows(accessor =>
+        {
+            for (int i = 0; i < accessor.Height; i++)
+            {
+                var row = accessor.GetRowSpan(i);
+                foreach (var pixel in row)
+                {
+                    Assert.AreEqual(color, pixel);
+                }
+            }
+        });
+    }
+
     public static void CompareImageFile(FileInfo file1, FileInfo file2)
     {
         var visionComparer = new VisionComparer();
-        var visionCompareResult = visionComparer.Compare(file1,file2);
+        var visionCompareResult = visionComparer.Compare(file1, file2);
         Assert.IsTrue(visionCompareResult.IsSimilar());
     }
 

src/MediaConverters/MediaConverters.Tests/Imaging/Effect/BitmapEffectExtensionTests.cs

@@ -110,6 +110,9 @@ public void SetBrightness2()
     {
         Image<Rgba32> image = TestFileProvider.GetDefaultTestImage();
         image.SetBrightness(0);
+
+        image.AssertSolidBlackColorImage();
+
         var file = image.SaveAndCompareTestFile("SetBrightness2.png");
         TestHelper.OpenFileInExplorer(file);
     }
@@ -179,6 +182,7 @@ public void SetBlackWhiteEffect4()
     {
         Image<Rgba32> image = TestFileProvider.GetDefaultTestImage();
         image.SetBlackWhiteEffect(0);
+        image.AssertSolidWhiteColorImage();
         var file = image.SaveAndCompareTestFile("SetBlackWhiteEffect4.png");
         TestHelper.OpenFileInExplorer(file);
     }
@@ -188,6 +192,7 @@ public void SetBlackWhiteEffect5()
     {
         Image<Rgba32> image = TestFileProvider.GetDefaultTestImage();
         image.SetBlackWhiteEffect(1);
+        image.AssertSolidBlackColorImage();
         var file = image.SaveAndCompareTestFile("SetBlackWhiteEffect5.png");
         TestHelper.OpenFileInExplorer(file);
     }