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132 lines
3.5 KiB
Go
132 lines
3.5 KiB
Go
package ioutils // import "github.com/docker/docker/pkg/ioutils"
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import (
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"bytes"
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"testing"
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)
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var (
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testMode os.FileMode = 0640
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)
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func init() {
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// Windows does not support full Linux file mode
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if runtime.GOOS == "windows" {
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testMode = 0666
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}
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}
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func TestAtomicWriteToFile(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "atomic-writers-test")
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if err != nil {
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t.Fatalf("Error when creating temporary directory: %s", err)
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}
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defer os.RemoveAll(tmpDir)
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expected := []byte("barbaz")
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if err := AtomicWriteFile(filepath.Join(tmpDir, "foo"), expected, testMode); err != nil {
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t.Fatalf("Error writing to file: %v", err)
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}
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actual, err := ioutil.ReadFile(filepath.Join(tmpDir, "foo"))
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if err != nil {
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t.Fatalf("Error reading from file: %v", err)
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}
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if !bytes.Equal(actual, expected) {
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t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
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}
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st, err := os.Stat(filepath.Join(tmpDir, "foo"))
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if err != nil {
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t.Fatalf("Error statting file: %v", err)
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}
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if expected := os.FileMode(testMode); st.Mode() != expected {
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t.Fatalf("Mode mismatched, expected %o, got %o", expected, st.Mode())
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}
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}
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func TestAtomicWriteSetCommit(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "atomic-writerset-test")
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if err != nil {
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t.Fatalf("Error when creating temporary directory: %s", err)
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}
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defer os.RemoveAll(tmpDir)
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if err := os.Mkdir(filepath.Join(tmpDir, "tmp"), 0700); err != nil {
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t.Fatalf("Error creating tmp directory: %s", err)
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}
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targetDir := filepath.Join(tmpDir, "target")
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ws, err := NewAtomicWriteSet(filepath.Join(tmpDir, "tmp"))
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if err != nil {
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t.Fatalf("Error creating atomic write set: %s", err)
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}
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expected := []byte("barbaz")
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if err := ws.WriteFile("foo", expected, testMode); err != nil {
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t.Fatalf("Error writing to file: %v", err)
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}
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if _, err := ioutil.ReadFile(filepath.Join(targetDir, "foo")); err == nil {
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t.Fatalf("Expected error reading file where should not exist")
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}
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if err := ws.Commit(targetDir); err != nil {
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t.Fatalf("Error committing file: %s", err)
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}
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actual, err := ioutil.ReadFile(filepath.Join(targetDir, "foo"))
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if err != nil {
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t.Fatalf("Error reading from file: %v", err)
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}
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if !bytes.Equal(actual, expected) {
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t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
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}
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st, err := os.Stat(filepath.Join(targetDir, "foo"))
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if err != nil {
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t.Fatalf("Error statting file: %v", err)
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}
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if expected := os.FileMode(testMode); st.Mode() != expected {
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t.Fatalf("Mode mismatched, expected %o, got %o", expected, st.Mode())
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}
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}
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func TestAtomicWriteSetCancel(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "atomic-writerset-test")
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if err != nil {
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t.Fatalf("Error when creating temporary directory: %s", err)
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}
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defer os.RemoveAll(tmpDir)
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if err := os.Mkdir(filepath.Join(tmpDir, "tmp"), 0700); err != nil {
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t.Fatalf("Error creating tmp directory: %s", err)
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}
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ws, err := NewAtomicWriteSet(filepath.Join(tmpDir, "tmp"))
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if err != nil {
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t.Fatalf("Error creating atomic write set: %s", err)
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}
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expected := []byte("barbaz")
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if err := ws.WriteFile("foo", expected, testMode); err != nil {
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t.Fatalf("Error writing to file: %v", err)
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}
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if err := ws.Cancel(); err != nil {
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t.Fatalf("Error committing file: %s", err)
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}
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if _, err := ioutil.ReadFile(filepath.Join(tmpDir, "target", "foo")); err == nil {
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t.Fatalf("Expected error reading file where should not exist")
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} else if !os.IsNotExist(err) {
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t.Fatalf("Unexpected error reading file: %s", err)
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}
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}
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