code: /*
   * Copyright (c) 2017-2018 The Regents of the University of California
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   * 1. Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package edu.berkeley.cs.jqf.examples.imageio;
  
  import javax.imageio.ImageIO;
  import javax.imageio.ImageReader;
  import javax.imageio.stream.ImageInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  import com.pholser.junit.quickcheck.From;
  import com.pholser.junit.quickcheck.generator.Size;
  import edu.berkeley.cs.jqf.examples.kaitai.PngKaitaiGenerator;
  import edu.berkeley.cs.jqf.fuzz.Fuzz;
  import edu.berkeley.cs.jqf.fuzz.JQF;
  import org.junit.After;
  import org.junit.Assume;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.runner.RunWith;
  
  @RunWith(JQF.class)
  public class PngReaderTest {
  
      @BeforeClass
      public static void disableCaching() {
          // Disable disk-caching as it slows down fuzzing
          // and makes image reads non-idempotent
          ImageIO.setUseCache(false);
      }
  
      private ImageReader reader;
  
      @Before
      public void setUp() {
          this.reader = ImageIO.getImageReadersByFormatName("png").next();
      }
  
      @After
      public void tearDown() {
          this.reader.dispose();
      }
  
      @Fuzz
      public void read(ImageInputStream input) throws IOException {
          // Decode image from input stream
          reader.setInput(input);
          // Bound dimensions
          Assume.assumeTrue(reader.getHeight(0) < 1024);
          Assume.assumeTrue(reader.getWidth(0) < 1024);
          // Parse PNG
          reader.read(0);
      }
  
      @Fuzz
      public void getWidth(ImageInputStream input) throws IOException {
          // Decode image from input stream
          reader.setInput(input);
          int width = reader.getWidth(0);
          System.out.println(width);
      }
  
      @Fuzz
      public void getHeight(ImageInputStream input) throws IOException {
          // Decode image from input stream
          reader.setInput(input);
          int height = reader.getHeight(0);
          System.out.println(height);
      }
  
      @Fuzz
      public void debugKaitai(@From(PngKaitaiGenerator.class) @Size(max = 256) InputStream input)  {
          try (FileOutputStream out = new FileOutputStream("kaitai.png")) {
              int val;
              while ((val = input.read()) != -1) {
                  out.write(val);
              }
          } catch (IOException e) {
              throw new RuntimeException(e);
          }
      }
  
  
      @Fuzz
      public void fuzzValidMetadata(@From(PngKaitaiGenerator.class) @Size(max = 256) InputStream input)  {
          // Decode image from input stream
          try {
              reader.setInput(ImageIO.createImageInputStream(input));
              reader.getImageMetadata(0);
          } catch (IOException e) {
              Assume.assumeNoException(e);
          }
  
      }
  
      @Fuzz
      public void fuzzValidImage(@From(PngKaitaiGenerator.class) @Size(max = 2048) InputStream input)  {
          // Decode image from input stream
          try {
              reader.setInput(ImageIO.createImageInputStream(input));
              reader.getImageMetadata(0);
              Assume.assumeTrue(reader.getHeight(0) < 1024);
              Assume.assumeTrue(reader.getWidth(0)  < 1024);
          } catch (IOException e) {
              Assume.assumeNoException(e);
          }
  
      }
  
      @Fuzz
      public void readUsingKaitai(@From(PngKaitaiGenerator.class) @Size(max = 1024) InputStream input) throws IOException {
          // Decode image from input stream
          reader.setInput(ImageIO.createImageInputStream(input));
          // Bound dimensions
          Assume.assumeTrue(reader.getHeight(0) < 1024);
          Assume.assumeTrue(reader.getWidth(0) < 1024);
          // Parse PNG
          reader.read(0);
      }
  
  }
  