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 is een geïnterpreteerde, high-level, general-purpose programmeertaal. In tegenstelling tot HTML, CSS en JavaScript, die voornamelijk worden gebruikt voor webontwikkeling, is Python veelzijdig en toepasbaar in diverse domeinen, waaronder softwareontwikkeling, data science en back-end ontwikkeling. In deze cursus worden de kernaspecten van Python behandeld en aan het einde ben je in staat om je eigen functies te schrijven.

Verdiep je in de basisprincipes van Python, verken je werkomgeving en voer eenvoudige wiskundige bewerkingen uit. Leer hoe je leesbare code schrijft met behulp van opmerkingen en hoe je zowel eenvoudige als geavanceerde wiskundige expressies verwerkt en de resultaten weergeeft.

Uitdaging: Letters Ophalen uit String

Oplossing

Uitdaging: Letters Ophalen uit String

Oplossing