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env GO111MODULE=on
[short] skip

# With good go.sum, verify succeeds by avoiding download.
cp go.sum.good go.sum
go mod verify
! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.1.0.zip

# With bad go.sum, verify succeeds by avoiding download.
cp go.sum.bad go.sum
go mod verify
! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.1.0.zip

# With bad go.sum, sync (which must download) fails.
rm go.sum
cp go.sum.bad go.sum
! go mod tidy
stderr 'checksum mismatch'
! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.1.0.zip

# With good go.sum, sync works.
rm go.sum
cp go.sum.good go.sum
go mod tidy
exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.1.0.zip
exists $GOPATH/pkg/mod/rsc.io/quote@v1.1.0/quote.go

# go.sum should have the new checksum for go.mod
grep '^rsc.io/quote v1.1.0/go.mod ' go.sum

# verify should work
go mod verify

# basic loading of module graph should detect incorrect go.mod files.
go mod graph
cp go.sum.bad2 go.sum
! go mod graph
stderr 'go.mod: checksum mismatch'

# go.sum should be created and updated automatically.
rm go.sum
go mod tidy
grep '^rsc.io/quote v1.1.0/go.mod ' go.sum
grep '^rsc.io/quote v1.1.0 ' go.sum

# verify should fail on a missing ziphash. tidy should restore it.
rm $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.1.0.ziphash
! go mod verify
stderr '^rsc.io/quote v1.1.0: missing ziphash: open '$GOPATH'[/\\]pkg[/\\]mod[/\\]cache[/\\]download[/\\]rsc.io[/\\]quote[/\\]@v[/\\]v1.1.0.ziphash'
go mod tidy
exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.1.0.ziphash
go mod verify

# Packages below module root should not be mentioned in go.sum.
rm go.sum
go mod edit -droprequire rsc.io/quote
go get rsc.io/quote/buggy
grep '^rsc.io/quote v1.5.2/go.mod ' go.sum
! grep buggy go.sum

# non-existent packages below module root should not be mentioned in go.sum
go mod edit -droprequire rsc.io/quote
! go list rsc.io/quote/morebuggy
grep '^rsc.io/quote v1.5.2/go.mod ' go.sum
! grep buggy go.sum

-- go.mod --
module x
require rsc.io/quote v1.1.0

-- x.go --
package x
import _ "rsc.io/quote"

-- go.sum.good --
rsc.io/quote v1.1.0 h1:a3YaZoizPtXyv6ZsJ74oo2L4/bwOSTKMY7MAyo4O/0c=

-- go.sum.bad --
rsc.io/quote v1.1.0 h1:a3YaZoizPtXyv6ZsJ74oo2L4/bwOSTKMY7MAyo4O/1c=

-- go.sum.bad2 --
rsc.io/quote v1.1.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl1=