| /* |
| * Copyright (c) 2008, 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 4313887 |
| * @summary Unit test for java.nio.file.Files.newByteChannel |
| * @library .. |
| * @modules jdk.unsupported |
| */ |
| |
| import java.nio.ByteBuffer; |
| import java.nio.file.*; |
| import static java.nio.file.StandardOpenOption.*; |
| import static com.sun.nio.file.ExtendedOpenOption.*; |
| import java.nio.file.attribute.FileAttribute; |
| import java.nio.channels.*; |
| import java.io.IOException; |
| import java.util.*; |
| |
| public class SBC { |
| |
| static boolean supportsLinks; |
| |
| public static void main(String[] args) throws Exception { |
| Path dir = TestUtil.createTemporaryDirectory(); |
| try { |
| supportsLinks = TestUtil.supportsLinks(dir); |
| |
| // open options |
| createTests(dir); |
| appendTests(dir); |
| truncateExistingTests(dir); |
| noFollowLinksTests(dir); |
| |
| // SeekableByteChannel methods |
| sizeTruncatePositionTests(dir); |
| |
| // platform specific |
| if (System.getProperty("os.name").startsWith("Windows")) |
| dosSharingOptionTests(dir); |
| |
| // misc. tests |
| badCombinations(dir); |
| unsupportedOptions(dir); |
| nullTests(dir); |
| |
| } finally { |
| TestUtil.removeAll(dir); |
| } |
| } |
| |
| // test CREATE and CREATE_NEW options |
| static void createTests(Path dir) throws Exception { |
| Path file = dir.resolve("foo"); |
| |
| // CREATE |
| try { |
| // create file (no existing file) |
| Files.newByteChannel(file, CREATE, WRITE).close(); |
| if (Files.notExists(file)) |
| throw new RuntimeException("File not created"); |
| |
| // create file (existing file) |
| Files.newByteChannel(file, CREATE, WRITE).close(); |
| |
| // create file where existing file is a sym link |
| if (supportsLinks) { |
| Path link = Files.createSymbolicLink(dir.resolve("link"), file); |
| try { |
| // file already exists |
| Files.newByteChannel(link, CREATE, WRITE).close(); |
| |
| // file does not exist |
| Files.delete(file); |
| Files.newByteChannel(link, CREATE, WRITE).close(); |
| if (Files.notExists(file)) |
| throw new RuntimeException("File not created"); |
| |
| } finally { |
| TestUtil.deleteUnchecked(link); |
| } |
| } |
| |
| } finally { |
| TestUtil.deleteUnchecked(file); |
| } |
| |
| // CREATE_NEW |
| try { |
| // create file |
| Files.newByteChannel(file, CREATE_NEW, WRITE).close(); |
| if (Files.notExists(file)) |
| throw new RuntimeException("File not created"); |
| |
| // create should fail |
| try { |
| SeekableByteChannel sbc = |
| Files.newByteChannel(file, CREATE_NEW, WRITE); |
| sbc.close(); |
| throw new RuntimeException("FileAlreadyExistsException not thrown"); |
| } catch (FileAlreadyExistsException x) { } |
| |
| // create should fail |
| if (supportsLinks) { |
| Path link = dir.resolve("link"); |
| Path target = dir.resolve("thisDoesNotExist"); |
| Files.createSymbolicLink(link, target); |
| try { |
| |
| try { |
| SeekableByteChannel sbc = |
| Files.newByteChannel(file, CREATE_NEW, WRITE); |
| sbc.close(); |
| throw new RuntimeException("FileAlreadyExistsException not thrown"); |
| } catch (FileAlreadyExistsException x) { } |
| |
| } finally { |
| TestUtil.deleteUnchecked(link); |
| } |
| } |
| |
| |
| } finally { |
| TestUtil.deleteUnchecked(file); |
| } |
| |
| // CREATE_NEW + SPARSE |
| try { |
| try (SeekableByteChannel sbc = Files.newByteChannel(file, CREATE_NEW, WRITE, SPARSE)) { |
| final long hole = 2L * 1024L * 1024L * 1024L; |
| sbc.position(hole); |
| write(sbc, "hello"); |
| long size = sbc.size(); |
| if (size != (hole + 5)) |
| throw new RuntimeException("Unexpected size"); |
| } |
| } finally { |
| TestUtil.deleteUnchecked(file); |
| } |
| } |
| |
| // test APPEND option |
| static void appendTests(Path dir) throws Exception { |
| Path file = dir.resolve("foo"); |
| try { |
| // "hello there" should be written to file |
| try (SeekableByteChannel sbc = Files.newByteChannel(file, CREATE_NEW, WRITE, APPEND)) { |
| write(sbc, "hello "); |
| sbc.position(0L); |
| write(sbc, "there"); |
| } |
| |
| // check file |
| try (Scanner s = new Scanner(file)) { |
| String line = s.nextLine(); |
| if (!line.equals("hello there")) |
| throw new RuntimeException("Unexpected file contents"); |
| } |
| |
| // check that read is not allowed |
| try (SeekableByteChannel sbc = Files.newByteChannel(file, APPEND)) { |
| sbc.read(ByteBuffer.allocate(100)); |
| } catch (NonReadableChannelException x) { |
| } |
| } finally { |
| // clean-up |
| TestUtil.deleteUnchecked(file); |
| } |
| } |
| |
| // test TRUNCATE_EXISTING option |
| static void truncateExistingTests(Path dir) throws Exception { |
| Path file = dir.resolve("foo"); |
| try { |
| try (SeekableByteChannel sbc = Files.newByteChannel(file, CREATE_NEW, WRITE)) { |
| write(sbc, "Have a nice day!"); |
| } |
| |
| // re-open with truncate option |
| // write short message and check |
| try (SeekableByteChannel sbc = Files.newByteChannel(file, WRITE, TRUNCATE_EXISTING)) { |
| write(sbc, "Hello there!"); |
| } |
| try (Scanner s = new Scanner(file)) { |
| String line = s.nextLine(); |
| if (!line.equals("Hello there!")) |
| throw new RuntimeException("Unexpected file contents"); |
| } |
| |
| // re-open with create + truncate option |
| // check file is of size 0L |
| try (SeekableByteChannel sbc = Files.newByteChannel(file, WRITE, CREATE, TRUNCATE_EXISTING)) { |
| long size = ((FileChannel)sbc).size(); |
| if (size != 0L) |
| throw new RuntimeException("File not truncated"); |
| } |
| |
| } finally { |
| // clean-up |
| TestUtil.deleteUnchecked(file); |
| } |
| |
| } |
| |
| // test NOFOLLOW_LINKS option |
| static void noFollowLinksTests(Path dir) throws Exception { |
| if (!supportsLinks) |
| return; |
| Path file = Files.createFile(dir.resolve("foo")); |
| try { |
| // ln -s foo link |
| Path link = dir.resolve("link"); |
| Files.createSymbolicLink(link, file); |
| |
| // open with NOFOLLOW_LINKS option |
| try { |
| Files.newByteChannel(link, READ, LinkOption.NOFOLLOW_LINKS); |
| throw new RuntimeException(); |
| } catch (IOException | UnsupportedOperationException x) { |
| } finally { |
| TestUtil.deleteUnchecked(link); |
| } |
| |
| } finally { |
| // clean-up |
| TestUtil.deleteUnchecked(file); |
| } |
| } |
| |
| // test size/truncate/position methods |
| static void sizeTruncatePositionTests(Path dir) throws Exception { |
| Path file = dir.resolve("foo"); |
| try { |
| try (SeekableByteChannel sbc = Files.newByteChannel(file, CREATE_NEW, READ, WRITE)) { |
| if (sbc.size() != 0L) |
| throw new RuntimeException("Unexpected size"); |
| |
| // check size |
| write(sbc, "hello"); |
| if (sbc.size() != 5L) |
| throw new RuntimeException("Unexpected size"); |
| |
| // truncate (size and position should change) |
| sbc.truncate(4L); |
| if (sbc.size() != 4L) |
| throw new RuntimeException("Unexpected size"); |
| if (sbc.position() != 4L) |
| throw new RuntimeException("Unexpected position"); |
| |
| // truncate (position should not change) |
| sbc.position(2L).truncate(3L); |
| if (sbc.size() != 3L) |
| throw new RuntimeException("Unexpected size"); |
| if (sbc.position() != 2L) |
| throw new RuntimeException("Unexpected position"); |
| } |
| } finally { |
| TestUtil.deleteUnchecked(file); |
| } |
| } |
| |
| // Windows specific options for the use by applications that really want |
| // to use legacy DOS sharing options |
| static void dosSharingOptionTests(Path dir) throws Exception { |
| Path file = Files.createFile(dir.resolve("foo")); |
| try { |
| // no sharing |
| try (SeekableByteChannel ch = Files.newByteChannel(file, READ, NOSHARE_READ, |
| NOSHARE_WRITE, NOSHARE_DELETE)) |
| { |
| try { |
| Files.newByteChannel(file, READ); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| try { |
| Files.newByteChannel(file, WRITE); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| try { |
| Files.delete(file); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| } |
| |
| // read allowed |
| try (SeekableByteChannel ch = Files.newByteChannel(file, READ, NOSHARE_WRITE, NOSHARE_DELETE)) { |
| Files.newByteChannel(file, READ).close(); |
| try { |
| Files.newByteChannel(file, WRITE); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| try { |
| Files.delete(file); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| } |
| |
| // write allowed |
| try (SeekableByteChannel ch = Files.newByteChannel(file, READ, NOSHARE_READ, NOSHARE_DELETE)) { |
| try { |
| Files.newByteChannel(file, READ); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| Files.newByteChannel(file, WRITE).close(); |
| try { |
| Files.delete(file); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| } |
| |
| // delete allowed |
| try (SeekableByteChannel ch = Files.newByteChannel(file, READ, NOSHARE_READ, NOSHARE_WRITE)) { |
| try { |
| Files.newByteChannel(file, READ); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| try { |
| Files.newByteChannel(file, WRITE); |
| throw new RuntimeException("Sharing violation expected"); |
| } catch (IOException ignore) { } |
| Files.delete(file); |
| } |
| |
| } finally { |
| TestUtil.deleteUnchecked(file); |
| } |
| } |
| |
| // invalid combinations of options |
| static void badCombinations(Path dir) throws Exception { |
| Path file = dir.resolve("bad"); |
| |
| try { |
| Files.newByteChannel(file, READ, APPEND); |
| throw new RuntimeException("IllegalArgumentException expected"); |
| } catch (IllegalArgumentException x) { } |
| |
| try { |
| Files.newByteChannel(file, WRITE, APPEND, TRUNCATE_EXISTING); |
| throw new RuntimeException("IllegalArgumentException expected"); |
| } catch (IllegalArgumentException x) { } |
| } |
| |
| // unsupported operations |
| static void unsupportedOptions(Path dir) throws Exception { |
| Path file = dir.resolve("bad"); |
| |
| OpenOption badOption = new OpenOption() { }; |
| try { |
| Files.newByteChannel(file, badOption); |
| throw new RuntimeException("UnsupportedOperationException expected"); |
| } catch (UnsupportedOperationException e) { } |
| try { |
| Files.newByteChannel(file, READ, WRITE, badOption); |
| throw new RuntimeException("UnsupportedOperationException expected"); |
| } catch (UnsupportedOperationException e) { } |
| } |
| |
| // null handling |
| static void nullTests(Path dir) throws Exception { |
| Path file = dir.resolve("foo"); |
| |
| try { |
| OpenOption[] opts = { READ, null }; |
| Files.newByteChannel((Path)null, opts); |
| throw new RuntimeException("NullPointerException expected"); |
| } catch (NullPointerException x) { } |
| |
| try { |
| Files.newByteChannel(file, (OpenOption[])null); |
| throw new RuntimeException("NullPointerException expected"); |
| } catch (NullPointerException x) { } |
| |
| try { |
| OpenOption[] opts = { READ, null }; |
| Files.newByteChannel(file, opts); |
| throw new RuntimeException("NullPointerException expected"); |
| } catch (NullPointerException x) { } |
| |
| try { |
| Files.newByteChannel(file, (Set<OpenOption>)null); |
| throw new RuntimeException("NullPointerException expected"); |
| } catch (NullPointerException x) { } |
| |
| try { |
| Set<OpenOption> opts = new HashSet<>(); |
| opts.add(READ); |
| opts.add(null); |
| Files.newByteChannel(file, opts); |
| throw new RuntimeException("NullPointerException expected"); |
| } catch (NullPointerException x) { } |
| |
| try { |
| EnumSet<StandardOpenOption> opts = EnumSet.of(READ); |
| Files.newByteChannel(file, opts, (FileAttribute[])null); |
| throw new RuntimeException("NullPointerException expected"); |
| } catch (NullPointerException x) { } |
| |
| try { |
| EnumSet<StandardOpenOption> opts = EnumSet.of(READ); |
| FileAttribute[] attrs = { null }; |
| Files.newByteChannel(file, opts, attrs); |
| throw new RuntimeException("NullPointerException expected"); |
| } catch (NullPointerException x) { } |
| } |
| |
| static void write(WritableByteChannel wbc, String msg) throws IOException { |
| ByteBuffer buf = ByteBuffer.wrap(msg.getBytes()); |
| while (buf.hasRemaining()) |
| wbc.write(buf); |
| } |
| } |