--- /dev/null 2016-03-21 12:07:26.538306000 +0530 +++ new/test/javax/imageio/stream/NullStreamCheckTest.java 2016-03-21 12:50:22.266256780 +0530 @@ -0,0 +1,114 @@ +/* + * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * @test + * @bug 8044289 + * @summary Test verifies that when ImageOutputStream + * is returned null while writing is it handled properly + * in ImageIO.write() API's. + * @run main NullStreamCheckTest + */ + +import java.awt.image.BufferedImage; +import java.io.File; +import java.io.IOException; +import java.io.OutputStream; +import java.net.MalformedURLException; +import javax.imageio.ImageIO; +import javax.imageio.spi.IIORegistry; +import javax.imageio.spi.ImageOutputStreamSpi; + +public class NullStreamCheckTest { + + // get ImageIORegistry default instance. + private static final IIORegistry localRegistry = IIORegistry. + getDefaultInstance(); + // stream variables needed for input and output. + static LocalOutputStream outputStream = new LocalOutputStream(); + + static final int width = 50, height = 50; + + // input and output BufferedImage needed while read and write. + static BufferedImage inputImage = new BufferedImage(width, height, + BufferedImage.TYPE_INT_ARGB); + static BufferedImage outputImage = new BufferedImage(width, height, + BufferedImage.TYPE_INT_ARGB); + + // creates test file needed for read and write in local directory. + private static File createTestFile(String name) throws IOException { + String sep = System.getProperty("file.separator"); + String dir = System.getProperty("test.src", "."); + String filePath = dir+sep; + File directory = new File(filePath); + File tmpTestFile = File.createTempFile(name, ".png", directory); + directory.delete(); + return tmpTestFile; + } + + private static void verifyFileWrite() throws IOException { + File outputTestFile = createTestFile("outputTestFile"); + try { + ImageIO.write(inputImage, "png", outputTestFile); + } catch (IOException ex) { + throw ex; + } finally { + outputTestFile.delete(); + } + } + + private static void verifyStreamWrite() throws IOException { + try { + ImageIO.write(inputImage, "png", outputStream); + } catch (IOException ex) { + throw ex; + } finally { + try { + outputStream.close(); + } catch (IOException ex) { + throw ex; + } + } + } + + public static void main(String[] args) throws IOException, + MalformedURLException { + + /* deregister ImageOutputStreamSpi so that we creatImageOutputStream + * returns null while writing. + */ + localRegistry.deregisterAll(ImageOutputStreamSpi.class); + /* verify possible ImageIO.write() scenario's for null stream output + * from createImageOutputStream() API in ImageIO class. + */ + verifyFileWrite(); + verifyStreamWrite(); + } + + static class LocalOutputStream extends OutputStream { + + @Override + public void write(int i) throws IOException { + } + } +}