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 TestDistanceConversion(unittest.TestCase):

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

    def test_distance_in_kilometers_value_correct(self):
        import user_code
        expected_value = 4677.4
        actual_value = user_code.distance_in_kilometers
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `distance_in_kilometers` variable contains `{expected_value}`.",
            f"Expected `distance_in_kilometers` to be `{expected_value}`, but got `{actual_value}`."
        )

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

    def test_distance_in_miles_value_correct(self):
        import user_code
        expected_value = user_code.distance_in_kilometers / 1.609
        actual_value = user_code.distance_in_miles
        _dynamic_test(
            self,
            abs(actual_value - expected_value) < 0.01, 
            f"The `distance_in_miles` variable contains `{expected_value}`.",
            f"Expected `distance_in_miles` to be `{expected_value}`, but got `{actual_value}`."
        )

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

    def test_int_distance_in_miles_value_correct(self):
        import user_code
        expected_value = int(user_code.distance_in_miles)
        actual_value = user_code.int_distance_in_miles
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `int_distance_in_miles` variable contains `{expected_value}`.",
            f"Expected `int_distance_in_miles` to be `{expected_value}`, but got `{actual_value}`."
        )

    def test_int_distance_in_miles_is_integer(self):
        import user_code
        _dynamic_test(
            self,
            isinstance(user_code.int_distance_in_miles, int),
            "The `int_distance_in_miles` variable is of type `int`.",
            "Expected `int_distance_in_miles` to be of type `int`."
        )

    def test_division_operator_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'/', user_code_source),
            "The division `/` operator is used for conversion.",
            "Expected the division `/` operator to be used for conversion."
        )

    def test_int_function_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'int\s*\(', user_code_source),
            "The `int()` function is used to convert `distance_in_miles` to an integer.",
            "Expected the `int()` function to be used to convert `distance_in_miles` to an integer."
        )

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

test_main.py

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Tauchen Sie in die Grundlagen von Python ein, erkunden Sie Ihre Arbeitsumgebung und führen Sie einfache mathematische Operationen durch. Lernen Sie, wie Sie mit Kommentaren lesbaren Code schreiben und sowohl grundlegende als auch fortgeschrittene mathematische Ausdrücke verarbeiten, während Sie Ihre Ergebnisse anzeigen.

Challenge: Converting Kilometers to Miles

Lösung