What you are suggesting is not a good test. You really can't understand what is happening without a fuel pressure gauge.
If the car has been sitting for a little while, you turn the key, the pump runs for about two seconds, and then you IMMEDIATELY depressed the valve on the fuel rail you should get a spray of fuel. But, that only happens if everything is working correctly - fuel pressure regulator, check valves, etc. - and there is no certainty that's true.
I would really encourage you to buy, rent, or borrow a fuel pressure gauge. They are typically not expensive.
If you are sure you can't get a gauge, then this is what I would recommend:
1. After the car has been sitting a while, turn the key and let the pump prime for 2 seconds
2. Depress the valve on the fuel rail and release any pressure that's built up
3. Crank the car over for 5-10 seconds
4. Depress the valve on the fuel rail and see if there is pressure
If yes, the pump and CPS are probably working
If no, then either the pump or CPS are not working
1. After the car has been sitting a while, depress the valve on the fuel rail and release any pressure that's built up
2. Use a jumper wire to run the fuel pump directly from the fuse box for 5-10 seconds
3. Depress the valve on the fuel rail and see if there is pressure
If yes, the pump is working
If no, then the pump is not working
I DO NOT recommend doing this. Releasing pressurized fuel into the atmosphere is a good way to start a fire. You should use a fuel pressure gauge. Continuing without one is dangerous.