SpaceX has tested the crew escape system on the ground, demonstrating the ability to abort on the pad from a booster that is about to explode. The next abort test will be an actual launch (using the launch vehicle they recovered about a week ago, which was it's 3rd) and abort during ascent.

“If my people, which are called by my name, shall humble themselves, and pray, and seek my face, and turn from their wicked ways; then will I hear from heaven, and will forgive their sin, and will heal their land.” - 2 Chronicles 7:14