My Heathkit Condenser Checker, circa 1949. Has never let me down. Costs a few dollars max on ePay or hamfest or junk shop. Had to re-cap mine first of course. Works great afterwards.
Tests caps at operating voltage and current. Just don't forget it, grabbing the test probes like you're used to doing with a multimeter will numb your whole arm (or worse). Don't ask me how I know that.
Multimeter trick will probably tell you if the cap is completely shorted or completely open, but that's about it. You can identify a bad cap that way but you can't guarantee a good one.
When multi-can electrolytics fail, not only do they leak or go open per section, but very often they short between each section too. Catastrophic results. Always take them out of circuit.