test/jdk/java/nio/channels/FileChannel/GetClosedChannel.java
changeset 47216 71c04702a3d5
parent 28062 52b80a88a63b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/nio/channels/FileChannel/GetClosedChannel.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2014, 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 8025619
+ * @summary Verify that a channel obtained from a closed stream is truly closed.
+ */
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.channels.ClosedChannelException;
+import java.nio.channels.FileChannel;
+
+public class GetClosedChannel {
+    private static final int NUM_CHANNELS = 3;
+    private static final int NUM_EXCEPTIONS = 2*NUM_CHANNELS;
+
+    public static void main(String[] args) throws IOException {
+        int exceptions = 0;
+        int openChannels = 0;
+
+        for (int i = 0; i < NUM_CHANNELS; i++) {
+            File f = File.createTempFile("fcbug", ".tmp");
+            f.deleteOnExit();
+
+            FileChannel fc = null;
+            boolean shared = false;
+            switch (i) {
+                case 0:
+                    System.out.print("FileInputStream...");
+                    FileInputStream fis = new FileInputStream(f);
+                    fis.close();
+                    fc = fis.getChannel();
+                    if (fc.isOpen()) {
+                        System.err.println("FileInputStream channel should not be open");
+                        openChannels++;
+                    }
+                    shared = true;
+                    break;
+                case 1:
+                    System.out.print("FileOutputStream...");
+                    FileOutputStream fos = new FileOutputStream(f);
+                    fos.close();
+                    fc = fos.getChannel();
+                    if (fc.isOpen()) {
+                        System.err.println("FileOutputStream channel should not be open");
+                        openChannels++;
+                    }
+                    break;
+                case 2:
+                    System.out.print("RandomAccessFile...");
+                    RandomAccessFile raf = new RandomAccessFile(f, "rw");
+                    raf.close();
+                    fc = raf.getChannel();
+                    if (fc.isOpen()) {
+                        System.err.println("RandomAccessFile channel should not be open");
+                        openChannels++;
+                    }
+                    break;
+                default:
+                    assert false : "Should not get here";
+            }
+
+            try {
+                long position = fc.position();
+                System.err.println("Channel "+i+" position is "+position);
+            } catch (ClosedChannelException cce) {
+                exceptions++;
+            }
+
+            try {
+                fc.tryLock(0, Long.MAX_VALUE, shared);
+            } catch (ClosedChannelException e) {
+                System.out.println("OK");
+                exceptions++;
+            } catch (Error err) {
+                System.err.println(err);
+            }
+        }
+
+        if (exceptions != NUM_EXCEPTIONS || openChannels != 0) {
+            throw new RuntimeException("FAILED:" +
+                    " ClosedChannelExceptions: expected: " + NUM_EXCEPTIONS +
+                    " actual: " + exceptions + ";" + System.lineSeparator() +
+                    " number of open channels: expected: 0 " +
+                    " actual: " + openChannels + ".");
+        }
+    }
+}