Improved unit test by using the native ImageMagick method instead.

Author: dlemstra

src/Magick.NET/MagickNET.cs

@@ -484,6 +484,9 @@ void IMagickNET.SetTempDirectory(string path)
     void IMagickNET.SetRandomSeed(ulong seed)
         => SetRandomSeed(seed);
 
+    internal static string? GetWindowsResource(string id)
+        => NativeMagickNET.GetWindowsResource(id);
+
     private static void CheckImageMagickFiles(string path)
     {
         foreach (var configurationFile in ConfigurationFiles.Default.All)

src/Magick.NET/Native/Magick.cs

@@ -33,6 +33,9 @@ private partial class NativeMagickNET
 
         public static partial string? GetFontName(IntPtr instance, nuint index);
 
+        [Cleanup]
+        public static partial string? GetWindowsResource(string id);
+
         public static partial void ResetRandomSeed();
 
         [Throws]

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

@@ -1,9 +1,6 @@
 // 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;
@@ -20,50 +17,13 @@ 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 = MagickNET.GetWindowsResource(configurationFile.FileName);
 
-                var data = Encoding.UTF8.GetString(bytes);
+                Assert.NotNull(data);
                 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);
     }
 }