def test_none(self):
     self.assertIsNone(valid_date.search("[02-31]"))
 def test_none_2(self):
     self.assertIsNone(valid_date.search("[ 6-03]"))
 def test_not_none_5(self):
     self.assertIsNotNone(valid_date.search("[[[08-29]]]"))
 def test_not_none_6(self):
     self.assertIsNotNone(valid_date.search("[02-[08-11]04]"))
 def test_not_none_4(self):
     self.assertIsNotNone(valid_date.search("[3] [12-04] [09-tenth]"))
 def test_not_none_3(self):
     self.assertIsNotNone(valid_date.search("ignored [08-11] ignored"))
 def test_not_none_2(self):
     self.assertIsNotNone(valid_date.search("[02-16]"))
 def test_not_none(self):
     self.assertIsNotNone(valid_date.search("[01-23]"))
 def test_none_4(self):
     self.assertIsNone(valid_date.search("[13-02]"))