How to measure Inductor maximum current?
I usually measure inductor saturation current using the following circuit.
You may need to adjust/replace components to your needs but the priciple is as follows.



Once the FET is turned ON the current through the Inductor starts to ramp up. If the inductor is not yet saturated this slope is constant. You can measure the current by measuring the voltage over the current sense resitor using an oscilloscope. You start with a very low duty cycle to make sure the inductor is not saturating at the beginning of the measurement. Then you start increasing the durty cycle while watching the current slope on the oscilloscope. At some point the slope of the inductor current will get more steep, thats where saturation starts.