cp go.mod go.mod.orig

# 'go list pkg' does not report an error when a retracted version is used.
go list -e -f '{{if .Error}}{{.Error}}{{end}}' ./use
! stdout .
cmp go.mod go.mod.orig

# Nor does 'go build'.
[!short] go build ./use
[!short] ! stderr .
[!short] cmp go.mod go.mod.orig

# Neither 'go list' nor 'go build' should download go.mod from the version
# that would list retractions.

cmp go.mod go.mod.empty

env GOFLAGS=-mod=readonly

# update go.mod - go get allowed
go get rsc.io/quote
grep rsc.io/quote go.mod

# update go.mod - go mod tidy allowed
cp go.mod.empty go.mod
go mod tidy
cp go.mod go.mod.tidy

# -mod=readonly must succeed once go.mod is up-to-date...
go list all

# ... even if it needs downloads

golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=

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

go mod download -json example.com/generics
go list -f '{{if eq .ImportPath "example.com/generics"}}{{.Module.GoVersion}}{{end}}' -deps -test example.com/m2/q
stdout 1.18


# Even at go 1.20 or earlier, 'go mod tidy' shouldn't need go.mod files or
# checksums that it won't record.

go mod tidy -go=1.20
go clean -modcache  # Remove checksums from the module cache, so that only go.sum is used.

# Control case: before upgrading, we have the sums we need.
# go list -deps -e -f $fmt .
# stdout '^rsc.io/quote: ok$'
# ! stdout rsc.io/sampler  # not imported by quote in this version
cp go.mod.orig go.mod
cp go.sum.orig go.sum
go mod tidy
cmp go.mod.orig go.mod
cmp go.sum.orig go.sum


# Upgrade a module. This also upgrades rsc.io/quote, and though we didn't load
# a package from it, we had the sum for its old version, so we need the

go run print_go_mod.go # use this program to write a go.mod with an absolute path
cp stdout go.mod

go list -modfile=go.mod all
-- print_go_mod.go --
//go:build ignore
package main

import (
    "fmt"
    "os"
)

func main() {
    work := os.Getenv("WORK")
fmt.Printf(`module example.com/mod

require b.com v0.0.0

replace b.com => %s\gopath\src/modb
`,  work)
}
-- a.go --
package a

cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=

# By default, 'go get' should ignore tests
cp go.mod.empty go.mod
go get m/a
! grep rsc.io/quote go.mod

# 'go get -t' should consider test dependencies of the named package.
cp go.mod.empty go.mod
go get -t m/a
grep 'rsc.io/quote v1.5.2$' go.mod

# 'go get -t' should not consider test dependencies of imported packages,
# including packages imported from tests.
cp go.mod.empty go.mod
go get -t m/b
! grep rsc.io/quote go.mod

	itd8{a: 0, b: 0, add: 0, sub: 0, mul: 0},
	itd8{a: 0, b: 1, add: 1, sub: -1, mul: 0, div: 0, mod: 0},
	itd8{a: 0, b: 126, add: 126, sub: -126, mul: 0, div: 0, mod: 0},
	itd8{a: 0, b: 127, add: 127, sub: -127, mul: 0, div: 0, mod: 0},
	itd8{a: 1, b: -128, add: -127, sub: -127, mul: -128, div: 0, mod: 1},
	itd8{a: 1, b: -127, add: -126, sub: -128, mul: -127, div: 0, mod: 1},
	itd8{a: 1, b: -1, add: 0, sub: 2, mul: -1, div: -1, mod: 0},