add negotiation tests
add negotiation tests

mharkus/Sia,MrStrong/Sia,mtlynch/Sia,NebulousLabs/Sia,rivine/rivine,johnathanhowell/Sia,NebulousLabs/Sia,mnsl/Sia,mtlynch/Sia,Mingling94/Sia,mharkus/Sia,ChrisSchinnerl/Sia,ericflo/Sia,ChrisSchinnerl/Sia,mnsl/Sia,rivine/rivine,ericflo/Sia,kustomzone/Sia,MrStrong/Sia