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Python Python Testing Be Assertive assertTrue and assertFalse

Posted by Annie Scott
Annie Scott
27,613 Points

Not sure how to do this , looking unitest link no help her

what am i doing wrong here

tests.py 
import unittest

from string_fun import is_palindrome


class PalindromeTestCase(unittest.TestCase):
    def test_good_is_palindrome(self):
        self.assertTrue(self.is_palindrome()) 
        pass

    def test_bad_palindrome(self):
        pass
string_fun.py 
def is_palindrome(yarn):
    """Return whether or not a string is a palindrome.

    A palindrome is a word/phrase that's the same in
    both directions.
    """
    return yarn == yarn[::-1]
Annie Scott
Annie Scott
27,613 Points

finally got answer from string_fun import is_palindrome

class PalindromeTestCase(unittest.TestCase): def test_good_palindrome(self): self.assertTrue(is_palindrome('tacocat'))

def test_bad_palindrome(self): self.assertFalse(is_palindrome())

1 Answer

Iain Simmons
Iain Simmons
Treehouse Moderator 32,305 Points

So, a few things:

  1. pass is only in there when the function isn't doing anything else. It's like a placeholder for functions until you add code that actually does something. So you can remove it from the first function.
  2. is_palindrome is a function that has been imported from another file, and isn't a method of the class you've got here, so you don't need to prefix it with self
  3. The question is actually asking you to test the is_palindrome function by using it on a string. You'll therefore need to pass a string into that function (first one that actually is a palindrome, such as "tacocat", and then one that isn't, like "tacodog", for example)
Annie Scott
Annie Scott
27,613 Points

thank you