/*
    * 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
    *
    *    https://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.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.channels.FileChannel;
  import java.nio.file.StandardOpenOption;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests functionality of {@link BufferedFileChannelInputStream}.
   *
   * This class was ported and adapted from Apache Spark commit 933dc6cb7b3de1d8ccaf73d124d6eb95b947ed19 where it was called
   * {@code BufferedFileChannelInputStreamSuite}.
   */
  class BufferedFileChannelInputStreamTest extends AbstractInputStreamTest {
  
      @SuppressWarnings("resource")
      @BeforeEach
      public void setUpInputStreams() throws IOException {
          // @formatter:off
          inputStreams = new InputStream[] {
              new BufferedFileChannelInputStream(InputPath), // default
              new BufferedFileChannelInputStream(InputPath, 123), // small, unaligned buffer size
              BufferedFileChannelInputStream.builder().setPath(InputPath).get(), // default
              BufferedFileChannelInputStream.builder().setPath(InputPath).setBufferSize(123).get(), // small, unaligned buffer size
              BufferedFileChannelInputStream.builder().setURI(InputPath.toUri()).setBufferSize(1024).get(), // URI and buffer size
              BufferedFileChannelInputStream.builder().setPath(InputPath).setOpenOptions(StandardOpenOption.READ).get(), // open options
              BufferedFileChannelInputStream.builder().setFileChannel(FileChannel.open(InputPath)).get(), // FileChannel
          };
          //@formatter:on
      }
  
      @Override
      @Test
      void testAvailableAfterOpen() throws Exception {
          for (final InputStream inputStream : inputStreams) {
              assertTrue(inputStream.available() > 0);
          }
      }
  
      @Test
      void testBuilderGet() {
          // java.lang.IllegalStateException: origin == null
          assertThrows(IllegalStateException.class, () -> BufferedFileChannelInputStream.builder().get());
      }
  
      @Test
      void testReadAfterClose() throws Exception {
          for (final InputStream inputStream : inputStreams) {
              inputStream.close();
              assertThrows(IOException.class, inputStream::read);
          }
      }
  
  }