If both fallopian tube is closed and do the fertility test. Can it come out 2 dark line?

Your fertility test will tell you only if you ovulate or not. That has nothing to do with whether your tubes are open or not. You can ovulate whether or not your tubes are open or not.
In order to get pregnant the tubes have to be open so sperm and egg can meet, but ovulation can happen anyway.

Yes, you can still get a positive OPK even if your tubes are blocked. You can get a positive opk even if you don’t have a uterus.It has nothing to do with your tubes. The opk is only telling you if you are gearing up to ovulate. Good luck