test_find_all_indexes_with_non_matching_patterns.py

test_find_all_indexes_with_non_matching_patterns.py

#!python

from strings import contains, find_index, find_all_indexes
import unittest


class StringsTest(unittest.TestCase):

    def test_find_all_indexes_with_matching_patterns(self):
        # Positive test cases (examples) with matching patterns
        assert find_all_indexes('abc', '') == [0, 1, 2]  # all strings contain empty string
        assert find_all_indexes('abc', 'a') == [0]  # single letters are easy
        assert find_all_indexes('abc', 'b') == [1]
        assert find_all_indexes('abc', 'c') == [2]
        assert find_all_indexes('abc', 'ab') == [0]  # multiple letters are harder
        assert find_all_indexes('abc', 'bc') == [1]
        assert find_all_indexes('abc', 'abc') == [0]  # all strings contain themselves
        assert find_all_indexes('aaa', 'a') == [0, 1, 2]  # multiple occurrences
        assert find_all_indexes('aaa', 'aa') == [0, 1]  # overlapping pattern


    def test_find_all_indexes_with_non_matching_patterns(self):
        # Negative test cases (counterexamples) with non-matching patterns
        assert find_all_indexes('abc', 'z') == []  # remember to test other letters
        assert find_all_indexes('abc', 'ac') == []  # important to test close cases
        assert find_all_indexes('abc', 'az') == []  # first letter, but not last
        assert find_all_indexes('abc', 'abz') == []  # first 2 letters, but not last


    def test_find_all_indexes_with_complex_patterns(self):
        # Difficult test cases (examples) with complex patterns
        assert find_all_indexes('ababc', 'abc') == [2]  # overlapping prefix
        assert find_all_indexes('bananas', 'nas') == [4]  # overlapping prefix
        assert find_all_indexes('abcabcabc', 'abc') == [0, 3, 6]  # multiple occurrences
        assert find_all_indexes('abcabcab', 'abc') == [0, 3]  # multiple occurrences
        assert find_all_indexes('abcabcdef', 'abcd') == [3]  # overlapping prefix
        assert find_all_indexes('abcabcdef', 'abcdef') == [3]  # overlapping prefix
        assert find_all_indexes('abcabcdabcde', 'abcde') == [7]  # overlapping prefix
        assert find_all_indexes('abcabcdabcde', 'abcd') == [3, 7]  # multiple occurrences, overlapping prefix
        assert find_all_indexes('abra cadabra', 'abra') == [0, 8]  # multiple occurrences
        assert find_all_indexes('abra cadabra', 'adab') == [6]  # overlapping prefix
        
       
       


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