def test_equals_2(self): self.assertEqual(duplicate_count("abcdea"), 1)
def test_equals(self): self.assertEqual(duplicate_count("abcde"), 0)
def test_equals_5(self): self.assertEqual(duplicate_count("indivisibility"), 1)
def test_equals_6(self): self.assertEqual(duplicate_count('indivisibilities'), 2)
def test_equals_4(self): self.assertEqual(duplicate_count("aabbcdeB"), 2)