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 TestStringIndexing(unittest.TestCase):

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

    def test_test_str_value_correct(self):
        import user_code
        expected_value = "This is a string for learning"
        actual_value = user_code.sample_text
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `sample_text` variable contains `{expected_value}`.",
            f"Expected `sample_text` to be `{expected_value}`, but got `{actual_value}`."
        )

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

    def test_first_char_value_correct(self):
        import user_code
        expected_value = user_code.sample_text[0]
        actual_value = user_code.first_char
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `first_char` variable contains `{expected_value}`.",
            f"Expected `first_char` to be `{expected_value}`, but got `{actual_value}`."
        )

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

    def test_last_char_value_correct(self):
        import user_code
        expected_value = user_code.sample_text[-1]
        actual_value = user_code.last_char
        _dynamic_test(
            self,
            actual_value == expected_value,
            f"The `last_char` variable contains `{expected_value}`.",
            f"Expected `last_char` to be `{expected_value}`, but got `{actual_value}`."
        )

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

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

    def test_indexing_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'\[\d+\]', user_code_source) and re.search(r'\[-\d+\]', user_code_source),
            "Indexing is used to extract characters from the string.",
            "Expected indexing to be used to extract characters from the string."
        )

    def test_slicing_used(self):
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            re.search(r'\[.*:.*\]', user_code_source),
            "String slicing is used to extract `for`.",
            "Expected string slicing to be used to extract `for`."
        )

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

test_main.py

Python er et fortolket højniveaus programmeringssprog til generelle formål. I modsætning til HTML, CSS og JavaScript, som primært anvendes til webudvikling, er Python alsidigt og kan bruges inden for forskellige områder, herunder softwareudvikling, datavidenskab og back-end udvikling. I dette kursus vil du udforske de centrale aspekter af Python, og ved kursets afslutning vil du kunne udforme dine egne funktioner.

Dyk ned i grundlæggende Python, udforsk dit arbejdsområde, og udfør simple matematiske operationer. Lær at skrive læsbar kode ved hjælp af kommentarer og håndter både grundlæggende og avancerede matematiske udtryk, mens du viser dine resultater.

Udfordring: Hentning af Bogstaver fra Streng

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Udfordring: Hentning af Bogstaver fra Streng

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