Godot test scene addon

addons/godot_test_scene/plugin.gd

@@ -0,0 +1,25 @@
+@tool
+extends EditorPlugin
+
+var play_test_button:Button
+
+func _enter_tree() -> void:
+	add_play_test_scene_button()
+
+func _exit_tree() -> void:
+	play_test_button.queue_free()
+
+func add_play_test_scene_button()->void:
+	var play_current_button := search_play_current_button(EditorInterface.get_base_control())
+	var play_test_button_scene := load("res://addons/godot_test_scene/test_scene_button.tscn") as PackedScene
+	play_test_button = play_test_button_scene.instantiate()
+	play_current_button.add_sibling(play_test_button)
+
+func search_play_current_button(node:Node)->Button:
+	if node is Button and (node as Button).tooltip_text == "Play the edited scene.":
+		return (node as Button)
+	for child in node.get_children():
+		var button := search_play_current_button(child)
+		if button is Button:
+			return button as Button
+	return null