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