package org.eclipse.aether.connector.basic;
   
   /*
    * 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.
   */
  
  import static org.junit.Assert.*;
  
  import java.io.File;
  import java.io.IOException;
  import java.net.URI;
  import java.nio.ByteBuffer;
  import java.nio.charset.StandardCharsets;
  import java.security.NoSuchAlgorithmException;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import org.eclipse.aether.internal.test.util.TestFileUtils;
  import org.eclipse.aether.spi.connector.layout.RepositoryLayout;
  import org.junit.Before;
  import org.junit.Test;
  
  public class ChecksumCalculatorTest
  {
  
      private static final String SHA1 = "SHA-1";
  
      private static final String MD5 = "MD5";
  
      private File file;
  
      private ChecksumCalculator newCalculator( String... algos )
      {
          List<RepositoryLayout.Checksum> checksums = new ArrayList<RepositoryLayout.Checksum>();
          for ( String algo : algos )
          {
              checksums.add( new RepositoryLayout.Checksum( algo, URI.create( "irrelevant" ) ) );
          }
          return ChecksumCalculator.newInstance( file, checksums );
      }
  
      private ByteBuffer toBuffer( String data )
      {
          return ByteBuffer.wrap( data.getBytes( StandardCharsets.UTF_8 ) );
      }
  
      @Before
      public void init()
          throws Exception
      {
          file = TestFileUtils.createTempFile( "Hello World!" );
      }
  
      @Test
      public void testNoOffset()
      {
          ChecksumCalculator calculator = newCalculator( SHA1, MD5 );
          calculator.init( 0 );
          calculator.update( toBuffer( "Hello World!" ) );
          Map<String, Object> digests = calculator.get();
          assertNotNull( digests );
          assertEquals( "2ef7bde608ce5404e97d5f042f95f89f1c232871", digests.get( SHA1 ) );
          assertEquals( "ed076287532e86365e841e92bfc50d8c", digests.get( MD5 ) );
          assertEquals( 2, digests.size() );
      }
  
      @Test
      public void testWithOffset()
      {
          ChecksumCalculator calculator = newCalculator( SHA1, MD5 );
          calculator.init( 6 );
          calculator.update( toBuffer( "World!" ) );
          Map<String, Object> digests = calculator.get();
          assertNotNull( digests );
          assertEquals( "2ef7bde608ce5404e97d5f042f95f89f1c232871", digests.get( SHA1 ) );
          assertEquals( "ed076287532e86365e841e92bfc50d8c", digests.get( MD5 ) );
          assertEquals( 2, digests.size() );
      }
  
      @Test
      public void testWithExcessiveOffset()
      {
          ChecksumCalculator calculator = newCalculator( SHA1, MD5 );
         calculator.init( 100 );
         calculator.update( toBuffer( "World!" ) );
         Map<String, Object> digests = calculator.get();
         assertNotNull( digests );
         assertTrue( digests.get( SHA1 ) instanceof IOException );
         assertTrue( digests.get( MD5 ) instanceof IOException );
         assertEquals( 2, digests.size() );
     }
 
     @Test
     public void testUnknownAlgorithm()
     {
         ChecksumCalculator calculator = newCalculator( "unknown", SHA1 );
         calculator.init( 0 );
         calculator.update( toBuffer( "Hello World!" ) );
         Map<String, Object> digests = calculator.get();
         assertNotNull( digests );
         assertEquals( "2ef7bde608ce5404e97d5f042f95f89f1c232871", digests.get( SHA1 ) );
         assertTrue( digests.get( "unknown" ) instanceof NoSuchAlgorithmException );
         assertEquals( 2, digests.size() );
     }
 
     @Test
     public void testNoInitCall()
     {
         ChecksumCalculator calculator = newCalculator( SHA1, MD5 );
         calculator.update( toBuffer( "Hello World!" ) );
         Map<String, Object> digests = calculator.get();
         assertNotNull( digests );
         assertEquals( "2ef7bde608ce5404e97d5f042f95f89f1c232871", digests.get( SHA1 ) );
         assertEquals( "ed076287532e86365e841e92bfc50d8c", digests.get( MD5 ) );
         assertEquals( 2, digests.size() );
     }
 
     @Test
     public void testRestart()
     {
         ChecksumCalculator calculator = newCalculator( SHA1, MD5 );
         calculator.init( 0 );
         calculator.update( toBuffer( "Ignored" ) );
         calculator.init( 0 );
         calculator.update( toBuffer( "Hello World!" ) );
         Map<String, Object> digests = calculator.get();
         assertNotNull( digests );
         assertEquals( "2ef7bde608ce5404e97d5f042f95f89f1c232871", digests.get( SHA1 ) );
         assertEquals( "ed076287532e86365e841e92bfc50d8c", digests.get( MD5 ) );
         assertEquals( 2, digests.size() );
     }
 
     @Test
     public void testRestartAfterError()
     {
         ChecksumCalculator calculator = newCalculator( SHA1, MD5 );
         calculator.init( 100 );
         calculator.init( 0 );
         calculator.update( toBuffer( "Hello World!" ) );
         Map<String, Object> digests = calculator.get();
         assertNotNull( digests );
         assertEquals( "2ef7bde608ce5404e97d5f042f95f89f1c232871", digests.get( SHA1 ) );
         assertEquals( "ed076287532e86365e841e92bfc50d8c", digests.get( MD5 ) );
         assertEquals( 2, digests.size() );
     }
 
 }