import unittest
import importlib
import re
import io
import contextlib


class TestTask(unittest.TestCase):
    def test_classes_exist(self):
        import user_code
        importlib.reload(user_code)

        Weapon = getattr(user_code, "Weapon", None)
        Warrior = getattr(user_code, "Warrior", None)

        _dynamic_test(
            self,
            Weapon is not None and Warrior is not None,
            "Weapon and Warrior classes exist",
            "Weapon and Warrior classes missing",
        )

    def test_weapon_init(self):
        import user_code
        importlib.reload(user_code)

        Weapon = getattr(user_code, "Weapon", None)
        sword = Weapon("Sword", 5)

        _dynamic_test(
            self,
            hasattr(sword, "name") and hasattr(sword, "attack"),
            "Weapon has name and attack attributes",
            "Weapon missing name or attack attribute",
        )
        _dynamic_test(
            self,
            sword.name == "Sword" and sword.attack == 5,
            "Weapon stores name and attack correctly",
            f"Expected ('Sword', 5), got ({getattr(sword,'name',None)}, {getattr(sword,'attack',None)})",
        )

    def test_warrior_init(self):
        import user_code
        importlib.reload(user_code)

        Warrior = getattr(user_code, "Warrior", None)
        w = Warrior("Conan")

        _dynamic_test(
            self,
            hasattr(w, "name") and w.name == "Conan",
            "Warrior stores name correctly",
            "Warrior missing name or stores it incorrectly",
        )
        _dynamic_test(
            self,
            hasattr(w, "weapon") and w.weapon is None,
            "Warrior starts unarmed (weapon is None)",
            "Warrior weapon should start as None",
        )

    def test_equip_weapon_composition(self):
        import user_code
        importlib.reload(user_code)

        Weapon = getattr(user_code, "Weapon", None)
        Warrior = getattr(user_code, "Warrior", None)

        sword = Weapon("Sword", 5)
        w = Warrior("Conan")
        w.equip_weapon(sword)

        _dynamic_test(
            self,
            hasattr(w, "weapon") and w.weapon is sword,
            "Warrior equips weapon via composition",
            "Weapon not equipped correctly (should store the same object)",
        )

    def test_show_weapon_output_unarmed(self):
        import user_code
        importlib.reload(user_code)

        Warrior = getattr(user_code, "Warrior", None)
        w = Warrior("Conan")

        out = _capture_print(w.show_weapon)
        expected = normalize_text("Conan is unarmed")

        _dynamic_test(
            self,
            normalize_text(out) == expected,
            "show_weapon prints unarmed message",
            f"Expected '{expected}', got '{normalize_text(out)}'",
        )

    def test_show_weapon_output_armed(self):
        import user_code
        importlib.reload(user_code)

        Weapon = getattr(user_code, "Weapon", None)
        Warrior = getattr(user_code, "Warrior", None)

        sword = Weapon("Sword", 5)
        w = Warrior("Conan")
        w.equip_weapon(sword)

        out = _capture_print(w.show_weapon)
        expected = normalize_text("Conan is holding a Sword")

        _dynamic_test(
            self,
            normalize_text(out) == expected,
            "show_weapon prints armed message",
            f"Expected '{expected}', got '{normalize_text(out)}'",
        )


def _capture_print(func, *args, **kwargs) -> str:
    buf = io.StringIO()
    with contextlib.redirect_stdout(buf):
        func(*args, **kwargs)
    return buf.getvalue().strip()


def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)


def normalize_text(text: str) -> str:
    text = text.strip().lower()
    text = re.sub(r"\s{2,}", " ", text)
    return text


if __name__ == "__main__":
    unittest.main()

test_main.py

Erlernen Sie den Aufbau sauberer, sicherer und skalierbarer Anwendungen mit objektorientierter Programmierung in Python. Behandelt werden die Grundlagen von Klassen und Objekten sowie fortgeschrittene Konzepte wie Vererbung, Komposition, Polymorphismus und Kapselung. Mit klaren Erklärungen und praxisnahen Beispielen entwickeln Sie die Fähigkeit, Python-Programme zu entwerfen, die leistungsfähig, wartbar und für den praktischen Einsatz geeignet sind.

Erlernen Sie die grundlegenden Bausteine der objektorientierten Programmierung in Python. Dieser Abschnitt behandelt Klassen, Objekte, Methoden und Variablen und vermittelt eine solide Grundlage, um zu verstehen, wie OOP Code organisiert und strukturiert.

Challenge: Building a Composed Warrior

Lösung

Challenge: Building a Composed Warrior

Lösung