Test main menu scrolling

dungeonbattle/menus.py

@@ -28,7 +28,7 @@ class MainMenu(Menu):
     values = [e for e in MainMenuValues]
 
 
-class ArbitraryMenu:
+class ArbitraryMenu(Menu):
     def __init__(self, values: list):
-        super().__init__(self)
+        super().__init__()
         self.values = values

dungeonbattle/tests/menus_test.py

@@ -0,0 +1,24 @@
+import unittest
+
+from dungeonbattle.menus import ArbitraryMenu, MainMenu, MainMenuValues
+
+
+class TestMenus(unittest.TestCase):
+    def test_scroll_menu(self) -> None:
+        """
+        Test to scroll the menu.
+        """
+        arbitrary_menu = ArbitraryMenu([])
+        self.assertEqual(arbitrary_menu.position, 0)
+
+        main_menu = MainMenu()
+        self.assertEqual(main_menu.position, 0)
+        self.assertEqual(main_menu.validate(), MainMenuValues.START)
+        main_menu.go_up()
+        self.assertEqual(main_menu.validate(), MainMenuValues.START)
+        main_menu.go_down()
+        self.assertEqual(main_menu.validate(), MainMenuValues.SETTINGS)
+        main_menu.go_down()
+        self.assertEqual(main_menu.validate(), MainMenuValues.EXIT)
+        main_menu.go_down()
+        self.assertEqual(main_menu.validate(), MainMenuValues.EXIT)