gistfile1.txt

"""
Splunk Interview Challenge

Description:
    How many times does it happen in the input string that exactly
    two 9s appeared after each other?

String:
    "9234997799123"
"""


def string_match(match, input_string):
    """
    Function to count how many times a string appears in an input string

    :param match: the string that wants to count
    :param input_string: input string to be used

    :return: how many times was found the match into input_string
    """
    count = 0

    for i in range(len(input_string)-len(match) + 1):

        if input_string[i:i + len(match)] == match:
            count+=1

    return count


def test_empty_string():
    """
    Test to validate an empty string
    """
    assert string_match(match="99", input_string="") == 0

def test_standard():
    """
    Standard string and expected return
    """
    assert string_match(match="99", input_string="9234997799123") == 2

def test_increase_string():
    """
    String increased to validate a string change
    """
    assert string_match(match="99", input_string="923499779912993") == 3