Law of Attraction must be testable

The Law of attraction must be testable. If the law of attraction is actually useful, then really you should be able to manifest anything you want. If you don't manifest what you want, then there are two possible explanations:
1) Law of attraction doesn't work
2) You did something wrong

Many believers of the Law of Attraction usually point to explanation number 2. However there must be some sort of way to test which explanation it really is.

If explanation number 2 is the correct one, then you should be able to change something so that you eventually get what you want, and consistently. However, from personal experience I still couldn't manifest what I wanted and therefore I believe that explanation number 1 fits best.