Why Did God Test Abraham? Giving an Answer

Why Did God Test Abraham? Scripture testifies that God by direct result of His being is all-knowing of events that have not yet come to pass: "Remember this and stand firm, recall it to mind, you transgressors, remember the former things of old; for I am God, and there is no other; I am God, and there is none like me, declaring the end from the beginning and from ancient times things not yet done, saying, 'My counsel shall stand, and I will accomplish all my purpose'" (English Standard Versio...