Here are the locations of the Bath and Body Works Candle Test Stores that I know of, and that confirmed they should have the test candles available when they release.
Locations are subject to change of course and not all locations will confirm on the phone should you call.
Located in: Perimeter Mall
Address: 4400 Ashford Dunwoody Rd, Atlanta, GA 30346
Located in: Cumberland Mall
Address: 1145 Cumberland Mall, Atlanta, GA 30339
Located in: Easton Town Center
Address: 178 EASTON TOWN CENTER, Columbus, OH 43219
Address: 5043 Tuttle Crossing Blvd, Dublin, OH 43016
A friend contacted me and said that these two stores are also candle test stores as they had the Unicorn Sprinkles collection and still have the Rose Test Candles.
Located in: Town Center at Cobb
Address: 400 Ernest W Barrett Pkwy NW, Kennesaw, GA 30144
Located in: The Avenue East Cobb
Address: 4475 Roswell Rd, Marietta, GA 30062
Some time ago, I remember a lady posting she went to this store and they had test candles but I am not sure if it is.
Located in: Fashion Centre at Pentagon City
Address: 1100 S Hayes St, Arlington, VA 22202