def test_lowercase_chaining_prefix(self): self.assertTrue(Track.chaining_prefix_is_valid("n"))
def test_letter_chaining_prefix(self): self.assertTrue(Track.chaining_prefix_is_valid("N"))
def test_alphanumeric_chaining_prefix(self): self.assertTrue(Track.chaining_prefix_is_valid("A1"))
def test_numeric_chaining_prefix(self): self.assertFalse(Track.chaining_prefix_is_valid(0))