def test_arc_does_not_intersect_arc(c, r, s, e):
    arc = ConstructionArc((0, 0), 1, -90, 90)
    assert len(arc.intersect_arc(ConstructionArc(c, r, s, e))) == 0
def test_arc_intersect_arc_in_two_points(c, r, s, e):
    arc = ConstructionArc((0, 0), 1, -90, 90)
    assert len(arc.intersect_arc(ConstructionArc(c, r, s, e))) == 2