def test_add_letter_left_error(self):
""" Attempt to add a letter that does not belong to either side. """
with self.assertRaises(ValueError):
l.Letter("q")
def test_add_letter_right_multi_error(self):
""" Attempt to add a multiple letter but with an error. """
with self.assertRaises(ValueError):
l.Letter(right="TDQ")
def test_add_letter_right_multi_valid(self):
""" Add multiple letters as a string. """
letter_actual = set(["B", "T", "D"])
letter_test = l.Letter(right="BTD").right
self.assertEqual(letter_actual, letter_test)
def test_add_letter_right_valid(self):
""" Add a letter that on the right hand side. """
letter_actual = set(["U"])
letter_test = l.Letter(right="u").right
self.assertEqual(letter_actual, letter_test)
def test_add_letter_left_multi_valid(self):
""" Add multiple letters as a string. """
letter_actual = set(["S", "T", "R"])
letter_test = l.Letter("str").left
self.assertEqual(letter_actual, letter_test)
def test_add_letter_left_valid(self):
""" Add a valid letter to the left hand side. """
letter_actual = set(["S"])
letter_test = l.Letter("s").left