We certainly haven't tested it. Right now all extraterrestrial bodies and even empty space are international commons by the terms of th UN outer space treaty, w

We certainly haven't tested it. Right now all extraterrestrial bodies and even empty space are international commons by the terms of th UN outer space treaty, which has been ratified by all space-going powers. However a nation can withdraw from the treaty with 1-yr notice, so this is of questionable value in predicting what will happen when we can make economic use of these resources.