Sure gave me a clear idea of the different options.
I did struggle to find a drain plug as all they sold at two local home improvement stores was 2" drain plugs.
My scenario required me to taper my drainset to match with 1.5" from the previous installer.
After racking my brain i went for the simple drain plugs that are common for laundry sinks etc.
I figured if the test passed then i was alright. If the test failed then i would really have to hunt to find the right drain plug to rule out a poor seal.