test/javax/imageio/plugins/shared/CanWriteSequence.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2017, 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.

@@ -21,10 +21,11 @@
  * questions.
  */
 
 import java.io.File;
 import java.io.FileOutputStream;
+import java.nio.file.Files;
 import java.util.Iterator;
 
 import javax.imageio.ImageIO;
 import javax.imageio.ImageWriter;
 import javax.imageio.metadata.IIOMetadata;

@@ -32,15 +33,22 @@
 import javax.imageio.spi.ImageWriterSpi;
 import javax.imageio.stream.ImageOutputStream;
 
 /**
  * @test
- * @bug 4958064
- * @author Sergey Bylokhov
+ * @bug     4958064 8183349
+ * @summary Test verifies that when we try to forcefully run
+ *          prepareWriteSequence() where it is not supported
+ *          will ImageIO throws an UnsupportedOperationException
+ *          or not.
+ * @run     main CanWriteSequence
  */
 public final class CanWriteSequence {
 
+    private static File file;
+    private static FileOutputStream fos;
+
     public static void main(final String[] args) throws Exception {
         final IIORegistry registry = IIORegistry.getDefaultInstance();
         final Iterator<ImageWriterSpi> iter =
                 registry.getServiceProviders(ImageWriterSpi.class,
                         provider -> true, true);

@@ -52,13 +60,13 @@
         }
         System.out.println("Test passed");
     }
 
     private static void test(final ImageWriter writer) throws Exception {
-        final File file = File.createTempFile("temp", ".img");
-        file.deleteOnExit();
-        final FileOutputStream fos = new FileOutputStream(file);
+        try {
+            file = File.createTempFile("temp", ".img");
+            fos = new FileOutputStream(file);
         final ImageOutputStream ios = ImageIO.createImageOutputStream(fos);
         writer.setOutput(ios);
         final IIOMetadata data = writer.getDefaultStreamMetadata(null);
 
         if (writer.canWriteSequence()) {

@@ -70,9 +78,13 @@
                         "UnsupportedOperationException was not thrown");
             } catch (final UnsupportedOperationException ignored) {
                 // expected
             }
         }
+        } finally {
         writer.dispose();
-        ios.close();
+            fos.close();
+            Files.delete(file.toPath());
+        }
     }
 }
+