def test_from_links_different_colors(self):
left = Link(x=10, y=20, c_flag=5)
right = Link(x=34, y=66, c_flag=6)
result = Event.from_link_pair(left, right)
self.assertIsNone(result)
def test_from_links_nonterminals(self):
left = Link(x=10, y=20, c_flag=5)
right = Link(x=34, y=66, c_flag=5)
expected = Event(sx=10, sy=20, ex=34, ey=66, c_flag=5)
result = Event.from_link_pair(left, right)
self.assertTrue(expected == result)
def test_from_links_terminal_left(self):
left = Link(x=10, y=20, c_flag=255)
right = Link(x=34, y=66, c_flag=5)
result = Event.from_link_pair(left, right)
self.assertIsNone(result)
