LightnessTest

tests/ImageSharp.Tests/Processing/Processors/Filters/LightnessTest.cs

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+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.PixelFormats;
+
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
+{
+    using SixLabors.ImageSharp.Processing;
+    using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
+
+    [GroupOutput("Filters")]
+    public class LightnessTest
+    {
+        private readonly ImageComparer imageComparer = ImageComparer.Tolerant(0.007F);
+
+        public static readonly TheoryData<float> LightnessValues
+        = new TheoryData<float>
+        {
+            .5F,
+           1.5F
+        };
+
+        [Theory]
+        [WithTestPatternImages(nameof(LightnessValues), 48, 48, PixelTypes.Rgba32)]
+        public void ApplyLightnessFilter<TPixel>(TestImageProvider<TPixel> provider, float value)
+            where TPixel : struct, IPixel<TPixel> => provider.RunValidatingProcessorTest(ctx => ctx.Lightness(value), value, this.imageComparer);
+    }
+}