#!/usr/bin/env python
 
import unittest
 
def is_valid_domain(domain):
    return domain.endswith('.com') and 'abc' not in domain
 
class TestIsValidDomain(unittest.TestCase):
 
    def test_edu_invalid(self):
        self.assertFalse(is_valid_domain('def.edu'))
 
    def test_abc_invalid(self):
        self.assertFalse(is_valid_domain('abc.com'))
        self.assertFalse(is_valid_domain('abce.com'))
        self.assertFalse(is_valid_domain('abcAnYTHing.com'))
 
    def test_dotcom_valid(self):
        self.assertTrue(is_valid_domain('a.com'))
        self.assertTrue(is_valid_domain('b.com'))
        self.assertTrue(is_valid_domain('ab.com'))
        self.assertTrue(is_valid_domain('ae.com'))
 
if __name__ == '__main__':
    unittest.main()

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