| /* |
| * 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.io.input; |
| |
| import static org.junit.jupiter.api.Assertions.assertArrayEquals; |
| |
| import java.io.ByteArrayInputStream; |
| import java.security.MessageDigest; |
| import java.util.Random; |
| |
| import org.junit.jupiter.api.Test; |
| |
| public class MessageDigestCalculatingInputStreamTest { |
| public static byte[] generateRandomByteStream(final int pSize) { |
| final byte[] buffer = new byte[pSize]; |
| final Random rnd = new Random(); |
| rnd.nextBytes(buffer); |
| return buffer; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| for (int i = 256; i < 8192; i = i*2) { |
| final byte[] buffer = generateRandomByteStream(i); |
| final MessageDigest md5Sum = MessageDigest.getInstance("MD5"); |
| final byte[] expect = md5Sum.digest(buffer); |
| try (final MessageDigestCalculatingInputStream md5InputStream = |
| new MessageDigestCalculatingInputStream(new ByteArrayInputStream(buffer))) { |
| md5InputStream.consume(); |
| final byte[] got = md5InputStream.getMessageDigest().digest(); |
| assertArrayEquals(expect, got); |
| } |
| } |
| } |
| |
| } |