fix: add guards for MagickImage.Shave

src/Magick.NET/MagickImage.cs

@@ -6012,7 +6012,12 @@ public void Shave(int size)
     /// <param name="topBottom">The number of pixels to shave top and bottom.</param>
     /// <exception cref="MagickException">Thrown when an error is raised by ImageMagick.</exception>
     public void Shave(int leftRight, int topBottom)
-        => _nativeInstance.Shave(leftRight, topBottom);
+    {
+        Throw.IfNegative(nameof(leftRight), leftRight);
+        Throw.IfNegative(nameof(topBottom), topBottom);
+
+        _nativeInstance.Shave(leftRight, topBottom);
+    }
 
     /// <summary>
     /// Shear image (create parallelogram by sliding image by X or Y axis).

tests/Magick.NET.Tests/MagickImageTests/TheShaveMethod.cs

@@ -1,6 +1,7 @@
 // Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using ImageMagick;
 using Xunit;
 
@@ -10,6 +11,30 @@ public partial class MagickImageTests
 {
     public class TheShaveMethod
     {
+        [Fact]
+        public void ShouldThrowExceptionWhenSizeIsNegative()
+        {
+            using var image = new MagickImage();
+
+            Assert.Throws<ArgumentException>("leftRight", () => image.Shave(-1));
+        }
+
+        [Fact]
+        public void ShouldThrowExceptionWhenLeftRightIsNegative()
+        {
+            using var image = new MagickImage();
+
+            Assert.Throws<ArgumentException>("leftRight", () => image.Shave(-1, 40));
+        }
+
+        [Fact]
+        public void ShouldThrowExceptionWhenTopBottomIsNegative()
+        {
+            using var image = new MagickImage();
+
+            Assert.Throws<ArgumentException>("topBottom", () => image.Shave(20, -1));
+        }
+
         [Fact]
         public void ShouldShaveSizeFromEdges()
         {