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// Copyright 2018 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !windows
// +build !windows
package renameio
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"testing"
)
func TestWriteFile(t *testing.T) {
for _, perm := range []os.FileMode{0o755, 0o644, 0o400, 0o765} {
t.Run(fmt.Sprintf("perm%04o", perm), func(t *testing.T) {
for _, umask := range []os.FileMode{0o000, 0o011, 0o007, 0o027, 0o077} {
t.Run(fmt.Sprintf("umask%04o", umask), func(t *testing.T) {
withUmask(t, umask)
maskedPerm := perm & ^umask
filename := filepath.Join(t.TempDir(), "hello.sh")
wantData := []byte("#!/bin/sh\necho \"Hello World\"\n")
if err := WriteFile(filename, wantData, perm); err != nil {
t.Fatal(err)
}
gotData, err := ioutil.ReadFile(filename)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(gotData, wantData) {
t.Errorf("got data %v, want data %v", gotData, wantData)
}
fi, err := os.Stat(filename)
if err != nil {
t.Fatal(err)
}
if gotPerm := fi.Mode() & os.ModePerm; gotPerm != maskedPerm {
t.Errorf("got permissions %04o, want %04o", gotPerm, maskedPerm)
}
})
}
})
}
}
func TestWriteFileIgnoreUmask(t *testing.T) {
withUmask(t, 0o077)
filename := filepath.Join(t.TempDir(), "file")
const wantPerm os.FileMode = 0o765
if err := WriteFile(filename, nil, wantPerm, IgnoreUmask()); err != nil {
t.Fatal(err)
}
fi, err := os.Stat(filename)
if err != nil {
t.Fatal(err)
}
if gotPerm := fi.Mode() & os.ModePerm; gotPerm != wantPerm {
t.Errorf("got permissions %04o, want %04o", gotPerm, wantPerm)
}
}
func TestWriteFileEquivalence(t *testing.T) {
type writeFunc func(string, []byte, os.FileMode, ...Option) error
type test struct {
name string
fn writeFunc
perm os.FileMode
umask os.FileMode
exists bool
}
var tests []test
for _, wf := range []struct {
name string
fn writeFunc
}{
{
name: "WriteFile",
fn: WriteFile,
},
{
name: "ioutil",
fn: func(filename string, data []byte, perm os.FileMode, opts ...Option) error {
return ioutil.WriteFile(filename, data, perm)
},
},
} {
for _, perm := range []os.FileMode{0o755, 0o644, 0o400, 0o765} {
for _, umask := range []os.FileMode{0o000, 0o011, 0o007, 0o027, 0o077} {
for _, exists := range []bool{false, true} {
name := fmt.Sprintf("%s/perm%04o/umask%04o", wf.name, perm, umask)
if exists {
name += "/exists"
}
tests = append(tests, test{
name: name,
fn: wf.fn,
perm: perm,
umask: umask,
exists: exists,
})
}
}
}
}
const existingPerm os.FileMode = 0o654
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
withUmask(t, tc.umask)
maskedPerm := tc.perm & ^tc.umask
filename := filepath.Join(t.TempDir(), "test.txt")
if tc.exists {
// Create file in preparation for replacement
fh, err := os.Create(filename)
if err != nil {
t.Errorf("Create(%q) failed: %v", filename, err)
}
if err := fh.Chmod(existingPerm); err != nil {
t.Errorf("Chmod() failed: %v", err)
}
fh.Close()
maskedPerm = existingPerm
}
wantData := []byte("content\n")
if err := tc.fn(filename, wantData, tc.perm); err != nil {
t.Fatal(err)
}
gotData, err := ioutil.ReadFile(filename)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(gotData, wantData) {
t.Errorf("got data %v, want data %v", gotData, wantData)
}
fi, err := os.Stat(filename)
if err != nil {
t.Fatal(err)
}
if gotPerm := fi.Mode() & os.ModePerm; gotPerm != maskedPerm {
t.Errorf("got permissions %04o, want %04o", gotPerm, maskedPerm)
}
})
}
}
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