# Download a module
go mod download -modcacherw rsc.io/quote
exists $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/go.mod

# 'go mod verify' should fail if we delete a file.
go mod verify
rm $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/go.mod
! go mod verify

# Create a .partial file to simulate an failure extracting the zip file.
cp empty $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.partial

# 'go mod verify' should not fail, since the module hasn't been completely
# ingested into the cache.
go mod verify

# 'go list' should not load packages from the directory.
# NOTE: the message "directory $dir outside available modules" is reported
# for directories not in the main module, active modules in the module cache,
# or local replacements. In this case, the directory is in the right place,
# but it's incomplete, so 'go list' acts as if it's not an active module.
! go list $GOPATH/pkg/mod/rsc.io/quote@v1.5.2
stderr 'outside available modules'

# 'go list -m' should not print the directory.
go list -m -f '{{.Dir}}' rsc.io/quote
! stdout .

# 'go mod download' should re-extract the module and remove the .partial file.
go mod download -modcacherw rsc.io/quote
! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.partial
exists $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/go.mod

# 'go list' should succeed.
go list $GOPATH/pkg/mod/rsc.io/quote@v1.5.2
stdout '^rsc.io/quote$'

# 'go list -m' should print the directory.
go list -m -f '{{.Dir}}' rsc.io/quote
stdout 'pkg[/\\]mod[/\\]rsc.io[/\\]quote@v1.5.2'

# go mod verify should fail if we delete a file.
go mod verify
rm $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/go.mod
! go mod verify

# 'go mod download' should not leave behind a directory or a .partial file
# if there is an error extracting the zip file.
env GODEBUG=modcacheunzipinplace=1
rm $GOPATH/pkg/mod/rsc.io/quote@v1.5.2
cp empty $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.zip
! go mod download
stderr 'not a valid zip file'
! exists $GOPATH/pkg/mod/rsc.io/quote@v1.5.2
! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.partial

-- go.mod --
module m

go 1.14

require rsc.io/quote v1.5.2

-- empty --