The SpaceX Starhopper is on a cement launch pad. Elon Musk has indicated the Raptor engine delivery and installation will start next week. SpaceX will one or three engines and begin hop tests. It is clear that SpaceX will start tests before adding a new nose cone is placed onto the Starhopper. SpaceX is talking about very low tethered hops as a start.
SOURCES- Elon Musk, Twitter, Cowboy Dan Twitter Written By Brian Wang
Raptor on way to Hopper. Will be mounted to vehicle next week.— Elon Musk (@elonmusk) March 8, 2019