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// Tests and benchmarks performed with default settings only.
package defaults
import (
"bytes"
"io"
"os"
"os/exec"
"runtime"
"sync"
"testing"
"github.com/rfjakob/gocryptfs/tests/test_helpers"
)
func TestMain(m *testing.M) {
test_helpers.ResetTmpDir(true)
test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "-zerokey")
r := m.Run()
test_helpers.UnmountPanic(test_helpers.DefaultPlainDir)
os.Exit(r)
}
// Test that we get the right timestamp when extracting a tarball.
func Test1980Tar(t *testing.T) {
c := exec.Command("tar", "xzf", "1980.tar.gz", "-C", test_helpers.DefaultPlainDir)
c.Stderr = os.Stderr
c.Stdout = os.Stdout
err := c.Run()
if err != nil {
t.Fatal(err)
}
fi, err := os.Stat(test_helpers.DefaultPlainDir + "/1980.txt")
if err != nil {
t.Fatal(err)
}
m := fi.ModTime().Unix()
if m != 315619323 {
t.Errorf("Wrong mtime: %d", m)
}
}
// In gocryptfs before v1.2, the file header was only read once for each
// open. But truncating a file to zero will generate a new random file ID.
// The sequence below caused an I/O error to be returned.
func TestOpenTruncateRead(t *testing.T) {
fn := test_helpers.DefaultPlainDir + "/TestTruncateWrite"
// First FD is used for write and trucate.
writeFd, err := os.Create(fn)
if err != nil {
t.Fatal(err)
}
abc := []byte("abc")
_, err = writeFd.WriteAt(abc, 0)
if err != nil {
t.Fatal(err)
}
// Second FD is just for reading.
readFd, err := os.Open(fn)
if err != nil {
t.Fatal(err)
}
content := make([]byte, 3)
_, err = readFd.ReadAt(content, 0)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(content, abc) {
t.Fatalf("wrong content: %s", string(content))
}
// Truncate to zero to generate a new file ID and write new content.
err = writeFd.Truncate(0)
if err != nil {
t.Fatal(err)
}
xyz := []byte("xyz")
_, err = writeFd.WriteAt(xyz, 0)
if err != nil {
t.Fatal(err)
}
// Try to read from the other FD.
_, err = readFd.ReadAt(content, 0)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(content, xyz) {
t.Fatalf("wrong content: %s", string(content))
}
}
// TestWORead tries to read from a write-only FD.
func TestWORead(t *testing.T) {
fn := test_helpers.DefaultPlainDir + "/TestWORead"
fd, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY, 0600)
if err != nil {
t.Fatal(err)
}
defer fd.Close()
buf := make([]byte, 10)
_, err = fd.Read(buf)
if err == nil {
t.Error("Reading from write-only file should fail, but did not")
}
}
// xfstests generic/124 triggers this warning:
// cipherSize 18 == header size: interrupted write?
// This test reproduces the problem.
func TestXfs124(t *testing.T) {
// GOMAXPROCS=8 and N=5000 seem to reliably trigger the problem. With N=1000,
// the test passes sometimes.
runtime.GOMAXPROCS(8)
N := 5000
fn := test_helpers.DefaultPlainDir + "/TestXfs124"
fd, err := os.Create(fn)
if err != nil {
t.Fatal(err)
}
defer fd.Close()
var wg sync.WaitGroup
wg.Add(2)
go func() {
buf := make([]byte, 10)
var err2 error
for i := 0; i < N; i++ {
err2 = fd.Truncate(0)
if err2 != nil {
panic(err2)
}
_, err2 = fd.WriteAt(buf, 0)
if err2 != nil {
panic(err2)
}
}
wg.Done()
}()
fd2, err := os.Open(fn)
if err != nil {
t.Fatal(err)
}
defer fd2.Close()
go func() {
buf := make([]byte, 10)
var err3 error
for i := 0; i < N; i++ {
_, err3 = fd2.ReadAt(buf, 0)
if err3 == io.EOF {
continue
}
if err3 != nil {
panic(err3)
}
}
wg.Done()
}()
wg.Wait()
}
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