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 is an interpreted high-level general-purpose programming language. Unlike HTML, CSS, and JavaScript, which are primarily used for web development, Python is versatile and can be used in various fields, including software development, data science, and back-end development. In this course, you'll explore the core aspects of Python, and by the end, you'll be crafting your own functions!

Learn how to use comparison and logical operators, work with conditional expressions, and apply membership and type comparisons. Build a strong foundation in writing programs that respond dynamically to different conditions using if/else and if/elif/else structures.

Challenge: Running Grocery Store Extended

Solution