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moby--moby/pkg/ioutils/fswriters_test.go
Tonis Tiigi ea3cbd3274 Safer file io for configuration files
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
2016-04-21 11:31:15 -07:00

31 lines
709 B
Go

package ioutils
import (
"bytes"
"io/ioutil"
"os"
"path/filepath"
"testing"
)
func TestAtomicWriteToFile(t *testing.T) {
tmpDir, err := ioutil.TempDir("", "atomic-writers-test")
if err != nil {
t.Fatalf("Error when creating temporary directory: %s", err)
}
defer os.RemoveAll(tmpDir)
expected := []byte("barbaz")
if err := AtomicWriteFile(filepath.Join(tmpDir, "foo"), expected, 0600); err != nil {
t.Fatalf("Error writing to file: %v", err)
}
actual, err := ioutil.ReadFile(filepath.Join(tmpDir, "foo"))
if err != nil {
t.Fatalf("Error reading from file: %v", err)
}
if bytes.Compare(actual, expected) != 0 {
t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
}
}