zstd.WithEncoderLevel(zstd.SpeedFastest),
		zstd.WithWindowSize(1<<20),
		zstd.WithEncoderConcurrency(2))
	if err != nil {
		return err
	}
	mEnc := msgp.NewWriter(enc)
	err = d.EncodeMsg(mEnc)
	if err != nil {
		return err
	}
	err = mEnc.Flush()
	if err != nil {
		return err
	}
	err = enc.Close()
	if err != nil {
		return err
	}
	return nil
}

		t.Errorf("writeString: expected %q, got %q", writeString, w.writeString)
	}
}

func TestBufferFull(t *testing.T) {
	const longString = "And now, hello, world! It is the time for all good men to come to the aid of their party"
	buf := NewReaderSize(strings.NewReader(longString), minReadBufferSize)
	line, err := buf.ReadSlice('!')
	if string(line) != "And now, hello, " || err != ErrBufferFull {