import unittest
import io
import re
from unittest import mock
import math
import student_X as main #Replace student_X with your filename 
    
    
    
 

class IsAbecedarianTests(unittest.TestCase):

    def test_default_case(self):
        function = main.is_abecedarian
        
        test = False
        try:
            incorrect = ""
            result = function.__doc__
            result = result.strip()
            test = incorrect != result
        except:
            pass
        message = "No docstring."
        self.assertTrue(test, message)

        
        inputs = ("")
        correct = True
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on the empty string."
        self.assertTrue(test, message)

        
        inputs = ("a")
        correct = True
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a single-character string."
        self.assertTrue(test, message)

        
        inputs = ("aa")
        correct = True
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a string that's only two of the same character."
        self.assertTrue(test, message)

        
        inputs = ("ab")
        correct = True
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on an abecedarian two-character string."
        self.assertTrue(test, message)

        
        inputs = ("ba")
        correct = False
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a non-abecedarian two-character string."
        self.assertTrue(test, message)

        
        inputs = ("fly")
        correct = True
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a short abecedarian string."
        self.assertTrue(test, message)

        
        inputs = ("ajax")
        correct = False
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a short non-abecedarian string."
        self.assertTrue(test, message)

        
        inputs = ('abbcdeinyz')
        correct = True
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a long abecedarian string."
        self.assertTrue(test, message)

        
        inputs = ("abcdefghhjiklmnopqrstuv")
        correct = False
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a long non-abecedarian string."
        self.assertTrue(test, message)
        
        
if __name__ == "__main__":
    tests = IsAbecedarianTests()
    tests.test_default_case()