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

class PrintWhetherPrimeTests(unittest.TestCase):

    def test_default_case(self):
        function = main.print_whether_prime

        try:
            docstring = function.__doc__
            docstring = docstring.strip()
        except:
            docstring = ""
        correct = docstring != ""
        message = "docstring is blank."
        self.assertTrue(correct, message) 

        

        with mock.patch('sys.stdout', new=io.StringIO()) as fake_stdout:
            function(53)
        output = fake_stdout.getvalue().strip()

        correct = "53" in output
        feedback = "Doesn't print out the parameter."
        self.assertTrue(correct, feedback)

        regex = "53 looks like it('| i)s (a |)prime.?"
        correct = re.match(regex, output)
        feedback = "Doesn't work on a prime number."
        self.assertTrue(correct, feedback)


        with mock.patch('sys.stdout', new=io.StringIO()) as fake_stdout:
            function(86)
        output = fake_stdout.getvalue().strip()

        regex = "86 is divisible by  ?43 ?.?"
        correct = re.match(regex, output)
        feedback = "Doesn't work on a composite number."
        self.assertTrue(correct, feedback)
        
        
if __name__ == "__main__":
    tests = PrintWhetherPrimeTests()
    tests.test_default_case()