def test_cicles_do_not_intersect():
M1 = (30, 30)
M2 = (40, 40)
M3 = (30.3, 30.3)
circle1 = ConstructionCircle(M1, 5)
circle2 = ConstructionCircle(M1, 3)
circle3 = ConstructionCircle(M2, 3)
circle4 = ConstructionCircle(M3, 3)
cross_points = circle1.intersect_circle(circle2)
assert len(cross_points) == 0
cross_points = circle2.intersect_circle(circle3)
assert len(cross_points) == 0
cross_points = circle1.intersect_circle(circle4)
assert len(cross_points) == 0
def test_two_circles_touching_at_one_point(center, point):
circle1 = ConstructionCircle((20, 20), 5)
circle2 = ConstructionCircle(center, 1.5)
points = circle1.intersect_circle(circle2)
assert len(points) == 1
return points[0].isclose(point, abs_tol=1e-9)