# When 'go get' is invoked on a module without a package in the root directory,
# it should add sums for the module's go.mod file and its content to go.sum.
# Verifies golang.org/issue/41103.
go mod init m
go get -d rsc.io/QUOTE
grep '^rsc.io/QUOTE v1.5.2/go.mod ' go.sum
grep '^rsc.io/QUOTE v1.5.2 ' go.sum

# Double-check rsc.io/QUOTE does not have a root package.
! go list -mod=readonly rsc.io/QUOTE
stderr '^cannot find module providing package rsc.io/QUOTE: import lookup disabled by -mod=readonly$'