This story is much more than a test of faith. Abraham didn't even question God's order or hesitate to carry it out. In the time Abraham lived, all the pagan gods demanded child sacrifice. God stopping Abraham from killing his son shows that He was different from all the other gods.
Discussion
If today I asked you to kill your child to prove your loyalty to me, and then just before you did it, I would say. Stop, I was just kidding, I don't want you to kill your child anymore. What would you say I am?
You not getting the point, it’s the faith and from above comment pagan gods were asking for human sacrifice. But the God of the Bible said no. Now it’s the faith or you can say strength. It’s a story and take it easy man. That’s the peak of faith. You don’t have to do that much just have little faith in yourself and you can move mountains. In todays world no one will do that and if you do that will be a criminal act and you can be behind bar.