def test_alphanumeric_chaining_line(self): self.assertFalse(Track.chaining_line_is_valid("A1"))
def test_numeric_chaining_line(self): self.assertFalse(Track.chaining_line_is_valid(0))
def test_longer_chaining_line(self): self.assertFalse(Track.chaining_line_is_valid("AAA"))
def test_digits_chaining_line(self): self.assertFalse(Track.chaining_line_is_valid("10"))
def test_long_chaining_line(self): self.assertTrue(Track.chaining_line_is_valid("AA"))