Recent changes in MIEngine broke an exisiting Launcher extension. Add test to verify that (#620)
Recent changes in MIEngine broke an exisiting Launcher extension. Add test to verify that (#620)

api surface is intact.
Microsoft/MIEngine,chuckries/MIEngine,chuckries/MIEngine,Microsoft/MIEngine,csiusers/MIEngine,chuckries/MIEngine,csiusers/MIEngine,orbitcowboy/MIEngine,orbitcowboy/MIEngine,csiusers/MIEngine,Microsoft/MIEngine,orbitcowboy/MIEngine,orbitcowboy/MIEngine,csiusers/MIEngine,chuckries/MIEngine,Microsoft/MIEngine