test/jdk/java/nio/file/Files/DeleteOnClose.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 4313887
 * @summary Unit test for DELETE_ON_CLOSE open option
 * @library /test/lib ..
 * @build jdk.test.lib.Utils
 *        jdk.test.lib.Asserts
 *        jdk.test.lib.JDKToolFinder
 *        jdk.test.lib.JDKToolLauncher
 *        jdk.test.lib.Platform
 *        jdk.test.lib.process.*
 * @run main DeleteOnClose
 */

import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.OpenOption;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SecureDirectoryStream;
import java.util.HashSet;
import java.util.Set;

import jdk.test.lib.process.ProcessTools;

import static java.nio.file.StandardOpenOption.READ;
import static java.nio.file.StandardOpenOption.WRITE;
import static java.nio.file.StandardOpenOption.DELETE_ON_CLOSE;

public class DeleteOnClose {

    public static void main(String[] args) throws Exception {
        if (args.length == 0) {
            Path file = Files.createTempFile("blah", "tmp");
            ProcessTools.executeTestJava(DeleteOnClose.class.getName(),
                                         file.toAbsolutePath().toString())
                        .shouldHaveExitValue(0);
            runTest(file);
        } else {
            // open file but do not close it. Its existance will be checked by
            // the caller.
            Files.newByteChannel(Paths.get(args[0]), READ, WRITE, DELETE_ON_CLOSE);
        }
    }

    public static void runTest(Path path) throws Exception {
        // check temporary file has been deleted after jvm termination
        if (Files.exists(path)) {
            throw new RuntimeException("Temporary file was not deleted");
        }

        // check temporary file has been deleted after closing it
        Path file = Files.createTempFile("blep", "tmp");
        Files.newByteChannel(file, READ, WRITE, DELETE_ON_CLOSE).close();
        if (Files.exists(file))
            throw new RuntimeException("Temporary file was not deleted");

        Path dir = Files.createTempDirectory("blah");
        try {
            // check that DELETE_ON_CLOSE fails when file is a sym link
            if (TestUtil.supportsSymbolicLinks(dir)) {
                file = dir.resolve("foo");
                Files.createFile(file);
                Path link = dir.resolve("link");
                Files.createSymbolicLink(link, file);
                try {
                    Files.newByteChannel(link, READ, WRITE, DELETE_ON_CLOSE);
                    throw new RuntimeException("IOException expected");
                } catch (IOException ignore) { }
            }

            // check that DELETE_ON_CLOSE works with files created via open
            // directories
            try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
                if (stream instanceof SecureDirectoryStream) {
                    SecureDirectoryStream<Path> secure = (SecureDirectoryStream<Path>)stream;
                    file = Paths.get("foo");

                    Set<OpenOption> opts = new HashSet<>();
                    opts.add(WRITE);
                    opts.add(DELETE_ON_CLOSE);
                    secure.newByteChannel(file, opts).close();

                    if (Files.exists(dir.resolve(file)))
                        throw new RuntimeException("File not deleted");
                }
            }
        } finally {
            TestUtil.removeAll(dir);
        }
    }
}