package autofile import ( "io/ioutil" "os" "path/filepath" "syscall" "testing" "time" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" tmos "github.com/tendermint/tendermint/libs/os" ) func TestSIGHUP(t *testing.T) { origDir, err := os.Getwd() require.NoError(t, err) t.Cleanup(func() { if err := os.Chdir(origDir); err != nil { t.Error(err) } }) // First, create a temporary directory and move into it dir, err := ioutil.TempDir("", "sighup_test") require.NoError(t, err) t.Cleanup(func() { os.RemoveAll(dir) }) err = os.Chdir(dir) require.NoError(t, err) // Create an AutoFile in the temporary directory name := "sighup_test" af, err := OpenAutoFile(name) require.NoError(t, err) require.True(t, filepath.IsAbs(af.Path)) // Write to the file. _, err = af.Write([]byte("Line 1\n")) require.NoError(t, err) _, err = af.Write([]byte("Line 2\n")) require.NoError(t, err) // Move the file over err = os.Rename(name, name+"_old") require.NoError(t, err) // Move into a different temporary directory otherDir, err := ioutil.TempDir("", "sighup_test_other") require.NoError(t, err) defer os.RemoveAll(otherDir) err = os.Chdir(otherDir) require.NoError(t, err) // Send SIGHUP to self. err = syscall.Kill(syscall.Getpid(), syscall.SIGHUP) require.NoError(t, err) // Wait a bit... signals are not handled synchronously. time.Sleep(time.Millisecond * 10) // Write more to the file. _, err = af.Write([]byte("Line 3\n")) require.NoError(t, err) _, err = af.Write([]byte("Line 4\n")) require.NoError(t, err) err = af.Close() require.NoError(t, err) // Both files should exist if body := tmos.MustReadFile(filepath.Join(dir, name+"_old")); string(body) != "Line 1\nLine 2\n" { t.Errorf("unexpected body %s", body) } if body := tmos.MustReadFile(filepath.Join(dir, name)); string(body) != "Line 3\nLine 4\n" { t.Errorf("unexpected body %s", body) } // The current directory should be empty files, err := ioutil.ReadDir(".") require.NoError(t, err) assert.Empty(t, files) } // // Manually modify file permissions, close, and reopen using autofile: // // We expect the file permissions to be changed back to the intended perms. // func TestOpenAutoFilePerms(t *testing.T) { // file, err := ioutil.TempFile("", "permission_test") // require.NoError(t, err) // err = file.Close() // require.NoError(t, err) // name := file.Name() // // open and change permissions // af, err := OpenAutoFile(name) // require.NoError(t, err) // err = af.file.Chmod(0755) // require.NoError(t, err) // err = af.Close() // require.NoError(t, err) // // reopen and expect an ErrPermissionsChanged as Cause // af, err = OpenAutoFile(name) // require.Error(t, err) // if e, ok := err.(*errors.ErrPermissionsChanged); ok { // t.Logf("%v", e) // } else { // t.Errorf("unexpected error %v", e) // } // } func TestAutoFileSize(t *testing.T) { // First, create an AutoFile writing to a tempfile dir f, err := ioutil.TempFile("", "sighup_test") require.NoError(t, err) err = f.Close() require.NoError(t, err) // Here is the actual AutoFile. af, err := OpenAutoFile(f.Name()) require.NoError(t, err) // 1. Empty file size, err := af.Size() require.Zero(t, size) require.NoError(t, err) // 2. Not empty file data := []byte("Maniac\n") _, err = af.Write(data) require.NoError(t, err) size, err = af.Size() require.EqualValues(t, len(data), size) require.NoError(t, err) // 3. Not existing file err = af.Close() require.NoError(t, err) err = os.Remove(f.Name()) require.NoError(t, err) size, err = af.Size() require.EqualValues(t, 0, size, "Expected a new file to be empty") require.NoError(t, err) // Cleanup _ = os.Remove(f.Name()) }