/*
    * 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.imaging.bytesource;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.BufferedOutputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.nio.file.Files;
  
  import org.apache.commons.imaging.AbstractImagingTest;
  import org.apache.commons.imaging.ImagingConstants;
  import org.junit.jupiter.api.Test;
  
  public abstract class AbstractByteSourceTest extends AbstractImagingTest {
      protected static byte[][] getTestByteArrays() {
          final byte[] single = new byte[1];
          for (int i = 0; i < single.length; i++) {
              single[i] = (byte) i;
          }
  
          final byte[] simple = new byte[256];
          for (int i = 0; i < simple.length; i++) {
              simple[i] = (byte) i;
          }
  
          final byte[] zeroes = new byte[256];
  
          final ByteArrayOutputStream baos = new ByteArrayOutputStream();
          for (int i = 0; i < 256 * 256; i++) {
              baos.write(0xff & i);
              baos.write(0xff & i >> 8);
          }
          final byte[] longArray = baos.toByteArray();
  
          return new byte[][] { ImagingConstants.EMPTY_BYTE_ARRAY, single, simple, zeroes, longArray, };
      }
  
      protected File createTempFile(final byte[] src) throws IOException {
          final File file = Files.createTempFile("raw_", ".bin").toFile();
  
          // write test bytes to file.
          try (FileOutputStream fos = new FileOutputStream(file);
                  OutputStream os = new BufferedOutputStream(fos)) {
              os.write(src);
          }
  
          // test that all bytes written to file.
          assertEquals(src.length, file.length());
  
          return file;
      }
  
      @Test
      public void testGetInputStreamThrowsNullPointerException() {
          assertThrows(NullPointerException.class, () -> ByteSource.array(null));
      }
  
  }