def test_arc_does_not_intersect_circle(c, r):
    arc = ConstructionArc((0, 0), 1, -90, 90)
    assert len(arc.intersect_circle(ConstructionCircle(c, r))) == 0
def test_arc_intersect_circle_in_two_points(c, r):
    arc = ConstructionArc((0, 0), 1, -90, 90)
    assert len(arc.intersect_circle(ConstructionCircle(c, r))) == 2