A low thrust pendulum at the NASA Johnson space center was used.
The best conventional Hall thruster can produce 60 millinewtons per kilowatt which is an order of magnitude more than the emdrive that was tested.
Light sails and photon propulsion (zero propellant propulsion) produces two orders of magnitude less the emdrive. 3.33-6.67 micronewtons per kilowatt.
This appears to conclusively prove that emdrive works for propulsion in terms of lab work. The other final thing is to put one into space and see it go a serious distnace.
More work would be to optimize emdrive and make it more powerful.