1 files changed, 71 insertions, 0 deletions
diff --git a/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators.Tests/TestData/Sources/MustBeVariant.GD0301.cs b/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators.Tests/TestData/Sources/MustBeVariant.GD0301.cs
new file mode 100644
index 0000000000..031039cba1
--- /dev/null
+++ b/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators.Tests/TestData/Sources/MustBeVariant.GD0301.cs
@@ -0,0 +1,71 @@
+using System;
+using Godot;
+using Godot.Collections;
+using Array = Godot.Collections.Array;
+
+public class MustBeVariantGD0301
+{
+    public void MethodCallsError()
+    {
+        // This raises a GD0301 diagnostic error: object is not Variant (and Method<T> requires a variant generic type).
+        Method<{|GD0301:object|}>();
+    }
+    public void MethodCallsOk()
+    {
+        // All these calls are valid because they are Variant types.
+        Method<bool>();
+        Method<char>();
+        Method<sbyte>();
+        Method<byte>();
+        Method<short>();
+        Method<ushort>();
+        Method<int>();
+        Method<uint>();
+        Method<long>();
+        Method<ulong>();
+        Method<float>();
+        Method<double>();
+        Method<string>();
+        Method<Vector2>();
+        Method<Vector2I>();
+        Method<Rect2>();
+        Method<Rect2I>();
+        Method<Transform2D>();
+        Method<Vector3>();
+        Method<Vector3I>();
+        Method<Vector4>();
+        Method<Vector4I>();
+        Method<Basis>();
+        Method<Quaternion>();
+        Method<Transform3D>();
+        Method<Projection>();
+        Method<Aabb>();
+        Method<Color>();
+        Method<Plane>();
+        Method<Callable>();
+        Method<Signal>();
+        Method<GodotObject>();
+        Method<StringName>();
+        Method<NodePath>();
+        Method<Rid>();
+        Method<Dictionary>();
+        Method<Array>();
+        Method<byte[]>();
+        Method<int[]>();
+        Method<long[]>();
+        Method<float[]>();
+        Method<double[]>();
+        Method<string[]>();
+        Method<Vector2[]>();
+        Method<Vector3[]>();
+        Method<Color[]>();
+        Method<GodotObject[]>();
+        Method<StringName[]>();
+        Method<NodePath[]>();
+        Method<Rid[]>();
+    }
+
+    public void Method<[MustBeVariant] T>()
+    {
+    }
+}