Added unit test to check if the ConfigureFiles are embedded as resources in the native library.

Author: dlemstra

tests/Magick.NET.Tests/Configuration/ConfigurationFilesTests/TheNativeResources.cs

@@ -0,0 +1,69 @@
+// Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
+// Licensed under the Apache License, Version 2.0.
+
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+using ImageMagick;
+using ImageMagick.Configuration;
+using Xunit;
+
+namespace Magick.NET.Tests.Configuration.ConfigurationFilesTests;
+
+public partial class ConfigurationFilesTests
+{
+    public class TheNativeResources
+    {
+        [Fact]
+        public void ShouldBeEmbeddedInTheNativeLibrary()
+        {
+            if (!Runtime.IsWindows)
+                Assert.Skip("The embedded resources are only available on Windows.");
+
+#if PLATFORM_x64 || PLATFORM_AnyCPU
+            var module = GetModuleHandle(ImageMagick.NativeLibrary.X64Name);
+#elif PLATFORM_arm64
+            var module = GetModuleHandle(ImageMagick.NativeLibrary.Arm64Name);
+#else
+            var module = GetModuleHandle(ImageMagick.NativeLibrary.X86Name);
+#endif
+            Assert.NotEqual(IntPtr.Zero, module);
+
+            foreach (var configurationFile in ConfigurationFiles.Default.All)
+            {
+                var resource = FindResource(module, configurationFile.FileName, "IMAGEMAGICK");
+                Assert.NotEqual(IntPtr.Zero, resource);
+
+                var resourceData = LoadResource(module, resource);
+                Assert.NotEqual(IntPtr.Zero, resourceData);
+
+                var resourcePointer = LockResource(resourceData);
+                Assert.NotEqual(IntPtr.Zero, resourcePointer);
+
+                var size = SizeofResource(module, resource);
+                Assert.NotEqual(0U, size);
+
+                var bytes = new byte[size];
+                Marshal.Copy(resourcePointer, bytes, 0, (int)size);
+
+                var data = Encoding.UTF8.GetString(bytes);
+                Assert.Equal(configurationFile.Data, data);
+            }
+        }
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        private static extern IntPtr FindResource(IntPtr hModule, string lpName, string lpType);
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        private static extern IntPtr GetModuleHandle(string lpModuleName);
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        private static extern IntPtr LoadResource(IntPtr hModule, IntPtr hResInfo);
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        private static extern IntPtr LockResource(IntPtr hResData);
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        private static extern uint SizeofResource(IntPtr hModule, IntPtr hResInfo);
+    }
+}