/*
    * 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 org.apache.commons.codec.digest.DigestUtils;
  import org.apache.commons.codec.digest.MessageDigestAlgorithms;
  import org.apache.commons.io.input.MessageDigestCalculatingInputStream.Builder;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link MessageDigestCalculatingInputStream}.
   */
  @SuppressWarnings("deprecation")
  public class MessageDigestCalculatingInputStreamTest {
  
      @Test
      public void testNormalUse() throws Exception {
          for (int i = 256; i < 8192; i *= 2) {
              final byte[] buffer = MessageDigestInputStreamTest.generateRandomByteStream(i);
              final MessageDigest defaultMessageDigest = MessageDigestCalculatingInputStream.getDefaultMessageDigest();
              final byte[] defaultExpect = defaultMessageDigest.digest(buffer);
              // Defaults
              try (MessageDigestCalculatingInputStream messageDigestInputStream = new MessageDigestCalculatingInputStream(new ByteArrayInputStream(buffer))) {
                  messageDigestInputStream.consume();
                  assertArrayEquals(defaultExpect, messageDigestInputStream.getMessageDigest().digest());
              }
              try (MessageDigestCalculatingInputStream messageDigestInputStream = MessageDigestCalculatingInputStream.builder()
                      .setInputStream(new ByteArrayInputStream(buffer)).get()) {
                  messageDigestInputStream.consume();
                  assertArrayEquals(defaultExpect, messageDigestInputStream.getMessageDigest().digest());
              }
              try (MessageDigestCalculatingInputStream messageDigestInputStream = MessageDigestCalculatingInputStream.builder().setByteArray(buffer).get()) {
                  messageDigestInputStream.consume();
                  assertArrayEquals(defaultExpect, messageDigestInputStream.getMessageDigest().digest());
              }
              // SHA-512
              final byte[] sha512Expect = DigestUtils.sha512(buffer);
              {
                  final Builder builder = MessageDigestCalculatingInputStream.builder();
                  builder.setMessageDigest(MessageDigestAlgorithms.SHA_512);
                  builder.setInputStream(new ByteArrayInputStream(buffer));
                  try (MessageDigestCalculatingInputStream messageDigestInputStream = builder.get()) {
                      messageDigestInputStream.consume();
                      assertArrayEquals(sha512Expect, messageDigestInputStream.getMessageDigest().digest());
                  }
              }
              {
                  final Builder builder = MessageDigestCalculatingInputStream.builder();
                  builder.setMessageDigest(MessageDigestAlgorithms.SHA_512);
                  builder.setInputStream(new ByteArrayInputStream(buffer));
                  try (MessageDigestCalculatingInputStream messageDigestInputStream = builder.get()) {
                      messageDigestInputStream.consume();
                      assertArrayEquals(sha512Expect, messageDigestInputStream.getMessageDigest().digest());
                  }
              }
          }
      }
  
  }