# Test default GOPROXY and GOSUMDB
env GOPROXY=
env GOSUMDB=
go env GOPROXY
stdout '^https://proxy.golang.org,direct$'
go env GOSUMDB
stdout '^sum.golang.org$'
env GOPROXY=https://proxy.golang.org
go env GOSUMDB
stdout '^sum.golang.org$'

# download direct from github
[!net] skip
[!exec:git] skip
env GOSUMDB=sum.golang.org
env GOPROXY=direct
go get -d rsc.io/quote

# download from proxy.golang.org with go.sum entry already
go clean -modcache
env GOSUMDB=
env GOPROXY=
go get -x -d rsc.io/quote
! stderr github
stderr proxy.golang.org/rsc.io/quote
! stderr sum.golang.org/tile
! stderr sum.golang.org/lookup/rsc.io/quote

# download again, using checksum database to validate new go.sum lines
rm go.sum
go get -x -d rsc.io/quote
! stderr github
stderr proxy.golang.org/rsc.io/quote
stderr sum.golang.org/tile
stderr sum.golang.org/lookup/rsc.io/quote

# test fallback to direct
env TESTGOPROXY404=1
go get -x -d rsc.io/quote
stderr 'proxy.golang.org.*404 testing'
stderr github.com/rsc

-- go.mod --
module m