def test_intersects_triangle(self):
p1 = IntegerPoint(0, 0)
p2 = IntegerPoint(2, 1)
p3 = IntegerPoint(1, 2)
t1 = IntegerTriangle(p1, p2, p3)
s1 = IntegerSegment((0, 1), (3, 1))
self.assertTrue(s1.intersects_triangle(t1))
def test_doesnt_intersect_triangle_common_side(self):
p1 = IntegerPoint(0, 0)
p2 = IntegerPoint(2, 1)
p3 = IntegerPoint(1, 2)
t1 = IntegerTriangle(p1, p2, p3)
s1 = IntegerSegment((-2, -1), (4, 2))
self.assertFalse(s1.intersects_triangle(t1))
