github.com/noxiouz/docker@v0.7.3-0.20160629055221-3d231c78e8c5/pkg/ioutils/fswriters_test.go (about) 1 package ioutils 2 3 import ( 4 "bytes" 5 "io/ioutil" 6 "os" 7 "path/filepath" 8 "testing" 9 ) 10 11 func TestAtomicWriteToFile(t *testing.T) { 12 tmpDir, err := ioutil.TempDir("", "atomic-writers-test") 13 if err != nil { 14 t.Fatalf("Error when creating temporary directory: %s", err) 15 } 16 defer os.RemoveAll(tmpDir) 17 18 expected := []byte("barbaz") 19 if err := AtomicWriteFile(filepath.Join(tmpDir, "foo"), expected, 0600); err != nil { 20 t.Fatalf("Error writing to file: %v", err) 21 } 22 23 actual, err := ioutil.ReadFile(filepath.Join(tmpDir, "foo")) 24 if err != nil { 25 t.Fatalf("Error reading from file: %v", err) 26 } 27 28 if bytes.Compare(actual, expected) != 0 { 29 t.Fatalf("Data mismatch, expected %q, got %q", expected, actual) 30 } 31 }