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// Copyright 2023 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.
//go:build unix
package main
import (
"os"
"path/filepath"
"strings"
"testing"
"time"
)
func TestPermissions(t *testing.T) {
if os.Getuid() == 0 {
t.Skip("skipping permission test when running as root")
}
dir := t.TempDir()
fn := filepath.Join(dir, "perm.go")
// Create a file that needs formatting without write permission.
if err := os.WriteFile(filepath.Join(fn), []byte(" package main"), 0o400); err != nil {
t.Fatal(err)
}
// Set mtime of the file in the past.
past := time.Now().Add(-time.Hour)
if err := os.Chtimes(fn, past, past); err != nil {
t.Fatal(err)
}
info, err := os.Stat(fn)
if err != nil {
t.Fatal(err)
}
defer func() { *write = false }()
*write = true
initParserMode()
initRewrite()
const maxWeight = 2 << 20
var buf, errBuf strings.Builder
s := newSequencer(maxWeight, &buf, &errBuf)
s.Add(fileWeight(fn, info), func(r *reporter) error {
return processFile(fn, info, nil, r)
})
if errBuf.Len() > 0 {
t.Log(errBuf)
}
if s.GetExitCode() == 0 {
t.Fatal("rewrite of read-only file succeeded unexpectedly")
}
info, err = os.Stat(fn)
if err != nil {
t.Fatal(err)
}
if !info.ModTime().Equal(past) {
t.Errorf("after rewrite mod time is %v, want %v", info.ModTime(), past)
}
}
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