A fun one that players like:
For your hand, aim and eye, the real stroke test is pocketing a tough ball with a smooth as silk, gorgeous stroke. Home Again Pool Shot:
1. Stick one of your object balls somewhere near the foot spot, but not on it (the foot spot is the place where the head ball goes in the rack for breaking).
2. Stick your cue ball somewhere near the head spot (the head spot is where the cue ball would be directly opposite the foot spot symmetrically on the table, middle of the table between the middle diamonds on the short rails and first two diamonds along the long rails).
3. Next, you pocket the object ball in either far corner BUT your cue ball must come "home again" to the head of the table where you stroked from, rolling three or four rails.
If you try to over-aim the object ball, it might make the pocket but you'll fail to score the cue ball home again. Same for if you hit too hard, use spin except for center ball/no spin, etc. This is my stroke test for champions. Just a few of these get me warmed up for pool!