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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package debug_test
import (
"reflect"
"runtime/debug"
"strings"
"testing"
)
// strip removes two leading tabs after each newline of s.
func strip(s string) string {
replaced := strings.ReplaceAll(s, "\n\t\t", "\n")
if len(replaced) > 0 && replaced[0] == '\n' {
replaced = replaced[1:]
}
return replaced
}
func FuzzParseBuildInfoRoundTrip(f *testing.F) {
// Package built from outside a module, missing some fields..
f.Add(strip(`
path rsc.io/fortune
mod rsc.io/fortune v1.0.0
`))
// Package built from the standard library, missing some fields..
f.Add(`path cmd/test2json`)
// Package built from inside a module.
f.Add(strip(`
go 1.18
path example.com/m
mod example.com/m (devel)
build -compiler=gc
`))
// Package built in GOPATH mode.
f.Add(strip(`
go 1.18
path example.com/m
build -compiler=gc
`))
// Escaped build info.
f.Add(strip(`
go 1.18
path example.com/m
build CRAZY_ENV="requires\nescaping"
`))
f.Fuzz(func(t *testing.T, s string) {
bi, err := debug.ParseBuildInfo(s)
if err != nil {
// Not a round-trippable BuildInfo string.
t.Log(err)
return
}
// s2 could have different escaping from s.
// However, it should parse to exactly the same contents.
s2 := bi.String()
bi2, err := debug.ParseBuildInfo(s2)
if err != nil {
t.Fatalf("%v:\n%s", err, s2)
}
if !reflect.DeepEqual(bi2, bi) {
t.Fatalf("Parsed representation differs.\ninput:\n%s\noutput:\n%s", s, s2)
}
})
}