
import unittest
import user_code
import ast
import re   
import importlib
import csv
import unittest
import importlib
import sys
import types

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

    def test_notifier_is_abstract(self):
        Notifier = getattr(self.user_code, 'Notifier', None)
        _dynamic_test(
            self,
            Notifier is not None and hasattr(Notifier, '__abstractmethods__') and 'send' in Notifier.__abstractmethods__,
            "Notifier is an abstract base class with abstract method 'send'",
            "Notifier class is missing or does not have abstract method 'send'"
        )

    def test_email_notifier_inherits(self):
        EmailNotifier = getattr(self.user_code, 'EmailNotifier', None)
        Notifier = getattr(self.user_code, 'Notifier', None)
        _dynamic_test(
            self,
            EmailNotifier is not None and Notifier is not None and issubclass(EmailNotifier, Notifier),
            "EmailNotifier correctly inherits from Notifier",
            "EmailNotifier does not inherit from Notifier"
        )

    def test_sms_notifier_inherits(self):
        SMSNotifier = getattr(self.user_code, 'SMSNotifier', None)
        Notifier = getattr(self.user_code, 'Notifier', None)
        _dynamic_test(
            self,
            SMSNotifier is not None and Notifier is not None and issubclass(SMSNotifier, Notifier),
            "SMSNotifier correctly inherits from Notifier",
            "SMSNotifier does not inherit from Notifier"
        )

    def test_email_notifier_send(self):
        EmailNotifier = getattr(self.user_code, 'EmailNotifier', None)
        _dynamic_test(
            self,
            EmailNotifier is not None,
            "EmailNotifier class is defined",
            "EmailNotifier class is missing"
        )
        email = EmailNotifier()
        result = email.send("Test message")
        _dynamic_test(
            self,
            isinstance(result, str) and result.startswith("Email sent:"),
            "EmailNotifier.send returns correct string format",
            f"EmailNotifier.send returned: {result}"
        )

    def test_sms_notifier_send(self):
        SMSNotifier = getattr(self.user_code, 'SMSNotifier', None)
        _dynamic_test(
            self,
            SMSNotifier is not None,
            "SMSNotifier class is defined",
            "SMSNotifier class is missing"
        )
        sms = SMSNotifier()
        result = sms.send("Test message")
        _dynamic_test(
            self,
            isinstance(result, str) and result.startswith("SMS sent:"),
            "SMSNotifier.send returns correct string format",
            f"SMSNotifier.send returned: {result}"
        )

    def test_notify_user_polymorphism(self):
        notify_user = getattr(self.user_code, 'notify_user', None)
        EmailNotifier = getattr(self.user_code, 'EmailNotifier', None)
        SMSNotifier = getattr(self.user_code, 'SMSNotifier', None)
        _dynamic_test(
            self,
            notify_user is not None,
            "notify_user function is defined",
            "notify_user function is missing"
        )
        email = EmailNotifier()
        sms = SMSNotifier()
        email_result = notify_user(email, "Welcome!")
        sms_result = notify_user(sms, "Your code is 1234.")
        _dynamic_test(
            self,
            isinstance(email_result, str) and email_result.startswith("Email sent:"),
            "notify_user works with EmailNotifier",
            f"notify_user(EmailNotifier, ...) returned: {email_result}"
        )
        _dynamic_test(
            self,
            isinstance(sms_result, str) and sms_result.startswith("SMS sent:"),
            "notify_user works with SMSNotifier",
            f"notify_user(SMSNotifier, ...) returned: {sms_result}"
        )

    def test_example_usage(self):
        # Check that the example usage variables exist and are correct types
        email_notifier = getattr(self.user_code, 'email_notifier', None)
        sms_notifier = getattr(self.user_code, 'sms_notifier', None)
        notify_user = getattr(self.user_code, 'notify_user', None)
        _dynamic_test(
            self,
            email_notifier is not None and sms_notifier is not None,
            "Example usage objects are defined",
            "email_notifier or sms_notifier is missing"
        )
        result_email = notify_user(email_notifier, "Welcome!")
        result_sms = notify_user(sms_notifier, "Your code is 1234.")
        _dynamic_test(
            self,
            isinstance(result_email, str) and result_email.startswith("Email sent:"),
            "email_notifier works with notify_user",
            f"email_notifier with notify_user returned: {result_email}"
        )
        _dynamic_test(
            self,
            isinstance(result_sms, str) and result_sms.startswith("SMS sent:"),
            "sms_notifier works with notify_user",
            f"sms_notifier with notify_user returned: {result_sms}"
        )

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):
    text = text.lower()
    text = re.sub(r"\\s{2,}", " ", text)
    text = re.sub(r"\\s*([,:?])\\s*", r"\\1 ", text)
    return text.strip()

def change_var(code: str, var_name: str, value: str) -> str:
    tree = ast.parse(code)
    lines = code.splitlines()
    changed = False
    # Collect all assignment nodes to modify
    assign_nodes = [
        (i, node)
        for i, node in enumerate(tree.body)
        if isinstance(node, ast.Assign)
        and any(isinstance(target, ast.Name) and target.id == var_name for target in node.targets)
    ]

    # If nothing to change, return unmodified code
    if not assign_nodes:
        return code

    # Perform replacements for all matching assignments (from last to first to not break line offsets)
    for i, node in reversed(assign_nodes):
        start_line = node.lineno - 1
        line = lines[start_line]
        indent = ' ' * (len(line) - len(line.lstrip()))
        lines[start_line] = f"{indent}{var_name} = {value}"
        next_line = len(lines)
        for next_node in tree.body[i+1:]:
            if hasattr(next_node, 'lineno'):
                next_line = next_node.lineno - 1
                break
        if next_line > start_line + 1:
            lines[start_line+1:next_line] = []
        changed = True

    return '\\n'.join(lines) if changed else code

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


test_main.py

Leer hoe je schone, veilige en schaalbare applicaties bouwt met objectgeoriënteerd programmeren in Python. Behandel de basisprincipes van klassen en objecten, en ga vervolgens in op geavanceerde concepten zoals overerving, compositie, polymorfisme en encapsulatie. Met duidelijke uitleg en praktische voorbeelden ontwikkel je het vermogen om Python-programma's te ontwerpen die krachtig, onderhoudbaar en klaar zijn voor gebruik in de praktijk.

Leer de kernbouwstenen van objectgeoriënteerd programmeren in Python. Deze sectie behandelt klassen, objecten, methoden en variabelen, en biedt een solide basis om te begrijpen hoe OOP code organiseert en structureert.

Ontdek hoe klassen functionaliteit kunnen delen en uitbreiden. U leert verschillende overervingspatronen, van eenvoudige hiërarchieën tot meervoudige overerving en abstracte klassen, en ziet hoe deze codehergebruik en schaalbaarheid mogelijk maken.

Ontdek hoe u flexibele systemen kunt bouwen door objecten te combineren. In plaats van uitsluitend te vertrouwen op overerving, ziet u hoe compositie het mogelijk maakt om gedragingen op een modulaire en aanpasbare manier samen te stellen.

Begrijpen hoe verschillende objecten een gemeenschappelijke interface kunnen delen terwijl ze zich op hun eigen manier gedragen. Deze sectie laat zien hoe methode-overschrijving, interfaces en protocollen uw code dynamischer en herbruikbaarder maken.

Leer hoe interne gegevens kunnen worden beschermd en de toegang tot klasse-attributen kan worden beheerst. U verkent private attributen, getters en setters, en technieken voor het verbergen van gegevens die uw klassen veilig en onderhoudbaar houden.

Uitdaging: Het Maken van een Blauwdruk voor een Notificatiesysteem

Oplossing