/*
 * Copyright (C)2016 - SMBJ Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hierynomus.test;

import java.util.Random;

public class PredictableRandom extends Random {
    private byte[] randomBytes;
    private int idx;

    public void init(byte[] bytes) {
        this.randomBytes = bytes;
        this.idx = 0;
    }

    @Override
    public void nextBytes(byte[] bytes) {
        for (int i = 0; i < bytes.length; i++) {
            bytes[i] = randomBytes[(idx + i) % randomBytes.length];
        }
        idx = (idx + bytes.length) % randomBytes.length;
    }
}
