I have posted the procedure for testing fuel pumps on this forum repeatedly over the past 20-something years. I can probably count the times it's actually been used on the fingers of one hand. A pint of fuel in 30 seconds pumped into a catch container at engine idle at idle is considered to be a minimum acceptable volume. If the engine won't run that long on the gas in the float bowl with the fuel line disconnected, you have other problems.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!