mirror of
https://github.com/octoleo/restic.git
synced 2024-11-05 21:07:52 +00:00
82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
package backend_test
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/rand"
|
|
"crypto/sha256"
|
|
"io"
|
|
"io/ioutil"
|
|
"testing"
|
|
|
|
"github.com/restic/restic/backend"
|
|
. "github.com/restic/restic/test"
|
|
)
|
|
|
|
func TestHashAppendWriter(t *testing.T) {
|
|
tests := []int{5, 23, 2<<18 + 23, 1 << 20}
|
|
|
|
for _, size := range tests {
|
|
data := make([]byte, size)
|
|
_, err := io.ReadFull(rand.Reader, data)
|
|
if err != nil {
|
|
t.Fatalf("ReadFull: %v", err)
|
|
}
|
|
|
|
expectedHash := sha256.Sum256(data)
|
|
|
|
target := bytes.NewBuffer(nil)
|
|
wr := backend.NewHashAppendWriter(target, sha256.New())
|
|
|
|
_, err = wr.Write(data)
|
|
OK(t, err)
|
|
OK(t, wr.Close())
|
|
|
|
Assert(t, len(target.Bytes()) == size+len(expectedHash),
|
|
"HashAppendWriter: invalid number of bytes written: got %d, expected %d",
|
|
len(target.Bytes()), size+len(expectedHash))
|
|
|
|
r := target.Bytes()
|
|
resultingHash := r[len(r)-len(expectedHash):]
|
|
Assert(t, bytes.Equal(expectedHash[:], resultingHash),
|
|
"HashAppendWriter: hashes do not match: expected %02x, got %02x",
|
|
expectedHash, resultingHash)
|
|
|
|
// write again, this must return an error
|
|
_, err = wr.Write([]byte{23})
|
|
Assert(t, err != nil,
|
|
"HashAppendWriter: Write() after Close() did not return an error")
|
|
}
|
|
}
|
|
|
|
func TestHashingWriter(t *testing.T) {
|
|
tests := []int{5, 23, 2<<18 + 23, 1 << 20}
|
|
|
|
for _, size := range tests {
|
|
data := make([]byte, size)
|
|
_, err := io.ReadFull(rand.Reader, data)
|
|
if err != nil {
|
|
t.Fatalf("ReadFull: %v", err)
|
|
}
|
|
|
|
expectedHash := sha256.Sum256(data)
|
|
|
|
wr := backend.NewHashingWriter(ioutil.Discard, sha256.New())
|
|
|
|
n, err := io.Copy(wr, bytes.NewReader(data))
|
|
OK(t, err)
|
|
|
|
Assert(t, n == int64(size),
|
|
"HashAppendWriter: invalid number of bytes written: got %d, expected %d",
|
|
n, size)
|
|
|
|
Assert(t, wr.Size() == size,
|
|
"HashAppendWriter: invalid number of bytes returned: got %d, expected %d",
|
|
wr.Size, size)
|
|
|
|
resultingHash := wr.Sum(nil)
|
|
Assert(t, bytes.Equal(expectedHash[:], resultingHash),
|
|
"HashAppendWriter: hashes do not match: expected %02x, got %02x",
|
|
expectedHash, resultingHash)
|
|
}
|
|
}
|