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

class GetLongestTests(unittest.TestCase):

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

        
        inputs = (["Hello"])
        original = copy.deepcopy(inputs)
        correct = "Hello"
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a list with only one string."
        self.assertTrue(test, message)
        test = inputs == original
        message = "Modifies the inputs."
        self.assertTrue(test, message)

        
        inputs = ([""])
        original = copy.deepcopy(inputs)
        correct = ""
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a list with only the empty string."
        self.assertTrue(test, message)
        test = inputs == original
        message = "Modifies the inputs."
        self.assertTrue(test, message)

        
        inputs = (["a", "aa"])
        original = copy.deepcopy(inputs)
        correct = "aa"
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a ['a', 'aa']."
        self.assertTrue(test, message)
        test = inputs == original
        message = "Modifies the inputs."
        self.assertTrue(test, message)

        
        inputs = (["aaa", "x"])
        original = copy.deepcopy(inputs)
        correct = "aaa"
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on ['aaa', 'x']."
        self.assertTrue(test, message)
        test = inputs == original
        message = "Modifies the inputs."
        self.assertTrue(test, message)

        
        inputs = (["a", "bb", "ccc", "dddd", "eeeee", "ffffff", "ggggggg"])
        original = copy.deepcopy(inputs)
        correct = "ggggggg"
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a long list of strings."
        self.assertTrue(test, message)
        test = inputs == original
        message = "Modifies the inputs."
        self.assertTrue(test, message)

        
        inputs = (["a", "bb", "ccc", "dddddddd", "eeeee", "ffffff", "ggggggg"])
        original = copy.deepcopy(inputs)
        correct = "dddddddd"
        if isinstance(inputs, tuple):
            result = function(*inputs)
        else:
            result = function(inputs)
        test = result == correct
        message = "Doesn't work on a semi-long list of strings."
        self.assertTrue(test, message)
        test = inputs == original
        message = "Modifies the inputs."
        self.assertTrue(test, message)
        
        
if __name__ == "__main__":
    tests = GetLongestTests()
    tests.test_default_case()