High current ripple through inductor
Make yourself a LR oscillator.The LR oscillator is the dual of the RC oscillator that everybody learnt about at colledge .The well documented RC osc that has a comparitor with hysterisis and a resistor and cap can have the resistor replaced with a current source giving a triangle wave of voltage across the cap .The triangle voltage runs between the upper and lower trip point  on your voltage compariter.Now all you do is set up the comp with hysterisis for two current pionts and then use some transistors to drive the coil.You can choose your current thresholds to emulate your proposed SMPS .Your supply volts can control the frequency so you can get close to your situation .I did this to check SMD coils as a proposed replacement for thru hole coils for S TRAP buck convertors .