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package restorer
import (
"os"
"path"
"strconv"
"syscall"
"testing"
"github.com/restic/restic/internal/fs"
"github.com/restic/restic/internal/test"
)
func TestPreallocate(t *testing.T) {
for _, i := range []int64{0, 1, 4096, 1024 * 1024} {
t.Run(strconv.FormatInt(i, 10), func(t *testing.T) {
dirpath := test.TempDir(t)
flags := os.O_CREATE | os.O_TRUNC | os.O_WRONLY
wr, err := os.OpenFile(path.Join(dirpath, "test"), flags, 0600)
test.OK(t, err)
defer func() {
test.OK(t, wr.Close())
}()
err = preallocateFile(wr, i)
if err == syscall.ENOTSUP {
t.SkipNow()
}
test.OK(t, err)
fi, err := wr.Stat()
test.OK(t, err)
efi := fs.ExtendedStat(fi)
test.Assert(t, efi.Size == i || efi.Blocks > 0, "Preallocated size of %v, got size %v block %v", i, efi.Size, efi.Blocks)
})
}
}
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