import unittest
import importlib
import re

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)

class TestTradingAlgorithm(unittest.TestCase):

    def test_initial_budget_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'initial_budget'),
            "The `initial_budget` variable is declared.",
            "Expected `initial_budget` variable to be declared."
        )

    def test_changes_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'changes'),
            "The `changes` variable is declared.",
            "Expected `changes` variable to be declared."
        )

    def test_final_budget_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'final_budget'),
            "The `final_budget` variable is declared.",
            "Expected `final_budget` variable to be declared."
        )

    def test_result_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'result'),
            "The `result` variable is declared.",
            "Expected `result` variable to be declared."
        )

    def test_result_logic_correct(self):
        import user_code
        expected_value = (
            "success" if user_code.final_budget > user_code.initial_budget else
            "budget unchanged" if user_code.final_budget == user_code.initial_budget else
            "failure"
        )
        actual_value = user_code.result
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `result` variable contains `{expected_value}`.",
            f"Expected `result` to be `{expected_value}`, but got `{actual_value}`."
        )

    def test_if_elif_else_statement_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'if', user_code_source) and re.search(r'elif', user_code_source) ,
            "The `if-elif-else` statement is used.",
            "Expected `if-elif-else` statement to be used."
        )

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

test_main.py

Pythonが条件分岐をどのように行うかを学びます。Booleanデータ型や比較演算子から始め、論理演算子を使った条件の組み合わせに進みます。メンバーシップや型の比較を探求し、if、elif、elseを用いた明確な条件式の書き方を習得します。

比較演算子および論理演算子の使用方法、条件式の操作、メンバーシップおよび型比較の適用方法について学習します。if/else および if/elif/else 構造を用いて、さまざまな条件に動的に対応するプログラム作成の基礎を確立します。

チャレンジ：食料品店の拡張版

解答