chore: add GUT test framework

addons/gut/scratch/override_getset.gd

@@ -0,0 +1,73 @@
+extends SceneTree
+
+
+class HasAccessors:
+    var normal_accessors = 'default' :
+        get:
+            print('@normal_accessors_getter')
+            return normal_accessors
+        set(val):
+            print('@normal_accessors_setter')
+            print('     = ', normal_accessors)
+            normal_accessors = val
+            print('     = ', normal_accessors)
+
+    var accessor_methods = 'default' :
+        get = _get_accessor_methods,
+        set = _set_accessor_methods
+
+    func _get_accessor_methods():
+        print('[base] _get_accessor_methods')
+        return accessor_methods
+
+    func _set_accessor_methods(val):
+        print('[base] _set_accessor_methods')
+        print('     = ', accessor_methods)
+        accessor_methods = val
+        print('     = ', accessor_methods)
+
+    func set(property, value):
+        print('!!!!!!!!!!!!! in set')
+        super.set(property, value)
+
+    func get(property):
+        print('!!!!!!!!!!!!! in get')
+        return super.get(property)
+
+
+class OverridesAccessorMethods:
+    extends HasAccessors
+
+    func _get_accessor_methods():
+        print('[override] _get_accessor_methods')
+        return super._get_accessor_methods()
+
+    func _set_accessor_methods(val):
+        print('[override] _set_accessor_methods')
+        super._set_accessor_methods(val)
+
+# ------------------------------------------------------------------------------
+
+func set_some_values(thing):
+    print('-- Setting normal_accessors')
+    thing.normal_accessors = 'hello'
+    print()
+    print('-- Setting accessor_methods')
+    thing.accessor_methods = 'world'
+    print()
+    print('-- Setting with set/get')
+    thing.set('accessor_methods', 'hello world')
+    print(thing.get('accessor_methods'))
+
+
+func _init():
+    print("starting")
+
+    var h = HasAccessors.new()
+    set_some_values(h)
+    print("\n\n")
+    var o = OverridesAccessorMethods.new()
+    set_some_values(o)
+
+    print("done")
+    quit();