github.com/amarpal/go-tools@v0.0.0-20240422043104-40142f59f616/internal/renameio/umask_test.go (about)

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build !plan9 && !windows && !js
     6  // +build !plan9,!windows,!js
     7  
     8  package renameio
     9  
    10  import (
    11  	"os"
    12  	"path/filepath"
    13  	"syscall"
    14  	"testing"
    15  )
    16  
    17  func TestWriteFileModeAppliesUmask(t *testing.T) {
    18  	dir := t.TempDir()
    19  
    20  	const mode = 0644
    21  	const umask = 0007
    22  	defer syscall.Umask(syscall.Umask(umask))
    23  
    24  	file := filepath.Join(dir, "testWrite")
    25  	err := WriteFile(file, []byte("go-build"), mode)
    26  	if err != nil {
    27  		t.Fatalf("Failed to write file: %v", err)
    28  	}
    29  
    30  	fi, err := os.Stat(file)
    31  	if err != nil {
    32  		t.Fatalf("Stat %q (looking for mode %#o): %s", file, mode, err)
    33  	}
    34  
    35  	if fi.Mode()&os.ModePerm != 0640 {
    36  		t.Errorf("Stat %q: mode %#o want %#o", file, fi.Mode()&os.ModePerm, 0640)
    37  	}
    38  }