def test_empty_string(self):
     self.assertEqual(is_anagram("", ""), True)
 def test_one_empty_string(self):
     self.assertEqual(is_anagram("a", ""), False)
 def test_5(self):
     self.assertEqual(is_anagram("AB", "ba"), False)
 def test_4(self):
     self.assertEqual(is_anagram("AB", "ab"), False)
 def test_3(self):
     self.assertEqual(is_anagram("ab", "ba"), True)
 def test_2(self):
     self.assertEqual(is_anagram("A", "B"), False)
 def test_1(self):
     self.assertEqual(is_anagram("A", "A"), True)