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package safefile
import (
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
)
func ensureFileContains(name, data string) error {
b, err := ioutil.ReadFile(name)
if err != nil {
return err
}
if string(b) != data {
return fmt.Errorf("wrong data in file: expected %s, got %s", data, string(b))
}
return nil
}
func tempFileName(count int) string {
return filepath.Join(os.TempDir(), fmt.Sprintf("safefile-test-%d-%x", count, time.Now().UnixNano()))
}
var testData = "Hello, this is a test data"
func testInTempDir() error {
name := tempFileName(0)
defer os.Remove(name)
f, err := Create(name, 0666)
if err != nil {
return err
}
if name != f.OrigName() {
f.Close()
return fmt.Errorf("name %q differs from OrigName: %q", name, f.OrigName())
}
_, err = io.WriteString(f, testData)
if err != nil {
f.Close()
return err
}
err = f.Commit()
if err != nil {
f.Close()
return err
}
err = f.Close()
if err != nil {
return err
}
return ensureFileContains(name, testData)
}
func TestMakeTempName(t *testing.T) {
// Make sure temp name is random.
m := make(map[string]bool)
for i := 0; i < 100; i++ {
name, err := makeTempName("/tmp", "sf")
if err != nil {
t.Fatal(err)
}
if m[name] {
t.Fatal("repeated file name")
}
m[name] = true
}
}
func TestFile(t *testing.T) {
err := testInTempDir()
if err != nil {
t.Fatal(err)
}
}
func TestWriteFile(t *testing.T) {
name := tempFileName(1)
err := WriteFile(name, []byte(testData), 0666)
if err != nil {
t.Fatal(err)
}
err = ensureFileContains(name, testData)
if err != nil {
os.Remove(name)
t.Fatal(err)
}
os.Remove(name)
}
func TestAbandon(t *testing.T) {
name := tempFileName(2)
f, err := Create(name, 0666)
if err != nil {
t.Fatal(err)
}
err = f.Close()
if err != nil {
t.Fatalf("Abandon failed: %s", err)
}
// Make sure temporary file doesn't exist.
_, err = os.Stat(f.Name())
if err != nil && !os.IsNotExist(err) {
t.Fatal(err)
}
}
func TestDoubleCommit(t *testing.T) {
name := tempFileName(3)
f, err := Create(name, 0666)
if err != nil {
t.Fatal(err)
}
err = f.Commit()
if err != nil {
os.Remove(name)
t.Fatalf("First commit failed: %s", err)
}
err = f.Commit()
if err != ErrAlreadyCommitted {
os.Remove(name)
t.Fatalf("Second commit didn't fail: %s", err)
}
err = f.Close()
if err != nil {
os.Remove(name)
t.Fatalf("Close failed: %s", err)
}
os.Remove(name)
}
func TestOverwriting(t *testing.T) {
name := tempFileName(4)
defer os.Remove(name)
olddata := "This is old data"
err := ioutil.WriteFile(name, []byte(olddata), 0600)
if err != nil {
t.Fatal(err)
}
newdata := "This is new data"
err = WriteFile(name, []byte(newdata), 0600)
if err != nil {
t.Fatal(err)
}
err = ensureFileContains(name, newdata)
if err != nil {
t.Fatal(err)
}
}
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