func random(t testing.TB, length int) []byte {
rd := restic.NewRandReader(rand.New(rand.NewSource(int64(length))))
buf := make([]byte, length)
_, err := io.ReadFull(rd, buf)
if err != nil {
t.Fatalf("unable to read %d random bytes: %v", length, err)
}
return buf
}
// fakeFile returns a reader which yields deterministic pseudo-random data.
func fakeFile(t testing.TB, seed, size int64) io.Reader {
return io.LimitReader(restic.NewRandReader(rand.New(rand.NewSource(seed))), size)
}