testing with all resamplers

tests/ImageSharp.Tests/Processing/Processors/Transforms/RotateTests.cs

@@ -8,6 +8,9 @@ using Xunit;
 // ReSharper disable InconsistentNaming
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
 {
+    using System;
+    using System.Reflection;
+
     public class RotateTests : FileTestBase
     {
         public static readonly TheoryData<float> RotateFloatValues
@@ -26,6 +29,25 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
             RotateType.Rotate270
         };
 
+        public static readonly TheoryData<string> ResmplerNames = new TheoryData<string>
+                                                                      {
+                                                                          nameof(KnownResamplers.Bicubic),
+                                                                          nameof(KnownResamplers.Box),
+                                                                          nameof(KnownResamplers.CatmullRom),
+                                                                          nameof(KnownResamplers.Hermite),
+                                                                          nameof(KnownResamplers.Lanczos2),
+                                                                          nameof(KnownResamplers.Lanczos3),
+                                                                          nameof(KnownResamplers.Lanczos5),
+                                                                          nameof(KnownResamplers.Lanczos8),
+                                                                          nameof(KnownResamplers.MitchellNetravali),
+                                                                          nameof(KnownResamplers.NearestNeighbor),
+                                                                          nameof(KnownResamplers.Robidoux),
+                                                                          nameof(KnownResamplers.RobidouxSharp),
+                                                                          nameof(KnownResamplers.Spline),
+                                                                          nameof(KnownResamplers.Triangle),
+                                                                          nameof(KnownResamplers.Welch),
+                                                                      };
+
         [Theory]
         [WithTestPatternImages(nameof(RotateFloatValues), 100, 50, DefaultPixelType)]
         [WithTestPatternImages(nameof(RotateFloatValues), 50, 100, DefaultPixelType)]
@@ -40,15 +62,17 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
         }
 
         [Theory]
-        [WithTestPatternImages(nameof(RotateFloatValues), 100, 50, DefaultPixelType)]
-        [WithTestPatternImages(nameof(RotateFloatValues), 50, 100, DefaultPixelType)]
-        public void RotateWithSampler<TPixel>(TestImageProvider<TPixel> provider, float value)
+        [WithTestPatternImages(nameof(ResmplerNames), 100, 50, DefaultPixelType)]
+        [WithTestPatternImages(nameof(ResmplerNames), 50, 100, DefaultPixelType)]
+        public void RotateWithSampler<TPixel>(TestImageProvider<TPixel> provider, string resamplerName)
             where TPixel : struct, IPixel<TPixel>
         {
+            IResampler resampler = GetResampler(resamplerName);
+
             using (Image<TPixel> image = provider.GetImage())
             {
-                image.Mutate(x => x.Rotate(value, KnownResamplers.Triangle));
-                image.DebugSave(provider, string.Join("_", value, "triangle"));
+                image.Mutate(x => x.Rotate(50, resampler));
+                image.DebugSave(provider, resamplerName);
             }
         }
 
@@ -64,5 +88,17 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Transforms
                 image.DebugSave(provider, value);
             }
         }
+
+        private static IResampler GetResampler(string name)
+        {
+            PropertyInfo property = typeof(KnownResamplers).GetTypeInfo().GetProperty(name);
+
+            if (property == null)
+            {
+                throw new Exception("Invalid property name!");
+            }
+
+            return (IResampler) property.GetValue(null);
+        }
     }
 }