Make Godot native staging target-aware

engine/Age.Engine.Tests/FfmpegMovieNativeTests.cs

@@ -0,0 +1,31 @@
+using System.Runtime.InteropServices;
+
+public class FfmpegMovieNativeTests
+{
+    [Theory]
+    [InlineData(true, false, Architecture.X64, "win-x64")]
+    [InlineData(true, false, Architecture.Arm64, "win-arm64")]
+    [InlineData(false, true, Architecture.X64, "osx-x64")]
+    [InlineData(false, true, Architecture.Arm64, "osx-arm64")]
+    [InlineData(false, false, Architecture.X64, "linux-x64")]
+    [InlineData(false, false, Architecture.Arm64, "linux-arm64")]
+    public void ResolverUsesOperatingSystemAndProcessArchitecture(
+        bool isWindows,
+        bool isMacOS,
+        Architecture architecture,
+        string expected)
+    {
+        Assert.Equal(
+            expected,
+            FfmpegMovieNative.RuntimeIdentifierFor(isWindows, isMacOS, architecture));
+    }
+
+    [Fact]
+    public void ResolverRejectsUnreservedArchitectures()
+    {
+        var error = Assert.Throws<PlatformNotSupportedException>(() =>
+            FfmpegMovieNative.RuntimeIdentifierFor(false, false, Architecture.Wasm));
+
+        Assert.Contains("Linux/Wasm", error.Message);
+    }
+}