mirror of https://github.com/octoleo/restic.git
74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
package hashing
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/rand"
|
|
"crypto/sha256"
|
|
"io"
|
|
"testing"
|
|
)
|
|
|
|
func TestWriter(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 := NewWriter(io.Discard, sha256.New())
|
|
|
|
n, err := io.Copy(wr, bytes.NewReader(data))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if n != int64(size) {
|
|
t.Errorf("Writer: invalid number of bytes written: got %d, expected %d",
|
|
n, size)
|
|
}
|
|
|
|
resultingHash := wr.Sum(nil)
|
|
|
|
if !bytes.Equal(expectedHash[:], resultingHash) {
|
|
t.Errorf("Writer: hashes do not match: expected %02x, got %02x",
|
|
expectedHash, resultingHash)
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkWriter(b *testing.B) {
|
|
buf := make([]byte, 1<<22)
|
|
_, err := io.ReadFull(rand.Reader, buf)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
expectedHash := sha256.Sum256(buf)
|
|
|
|
b.SetBytes(int64(len(buf)))
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
wr := NewWriter(io.Discard, sha256.New())
|
|
n, err := io.Copy(wr, bytes.NewReader(buf))
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
if n != int64(len(buf)) {
|
|
b.Errorf("Writer: invalid number of bytes written: got %d, expected %d",
|
|
n, len(buf))
|
|
}
|
|
|
|
resultingHash := wr.Sum(nil)
|
|
if !bytes.Equal(expectedHash[:], resultingHash) {
|
|
b.Errorf("Writer: hashes do not match: expected %02x, got %02x",
|
|
expectedHash, resultingHash)
|
|
}
|
|
}
|
|
}
|