| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.commons.math3.random; |
| |
| import java.util.Random; |
| |
| /** |
| * Test cases for the BitStreamGenerator class |
| * |
| */ |
| |
| public class BitsStreamGeneratorTest extends RandomGeneratorAbstractTest { |
| |
| public BitsStreamGeneratorTest() { |
| super(); |
| } |
| |
| @Override |
| protected RandomGenerator makeGenerator() { |
| RandomGenerator generator = new TestBitStreamGenerator(); |
| generator.setSeed(1000); |
| return generator; |
| } |
| |
| /** |
| * Test BitStreamGenerator using a Random as bit source. |
| */ |
| static class TestBitStreamGenerator extends BitsStreamGenerator { |
| |
| private static final long serialVersionUID = 1L; |
| private BitRandom ran = new BitRandom(); |
| |
| @Override |
| public void setSeed(int seed) { |
| ran.setSeed(seed); |
| clear(); |
| } |
| |
| @Override |
| public void setSeed(int[] seed) { |
| ran.setSeed(seed[0]); |
| } |
| |
| @Override |
| public void setSeed(long seed) { |
| ran.setSeed((int) seed); |
| |
| } |
| |
| @Override |
| protected int next(int bits) { |
| return ran.nextBits(bits); |
| } |
| } |
| |
| /** |
| * Extend Random to expose next(bits) |
| */ |
| @SuppressWarnings("serial") |
| static class BitRandom extends Random { |
| public BitRandom() { |
| super(); |
| } |
| public int nextBits(int bits) { |
| return next(bits); |
| } |
| } |
| |
| } |