/*

 * 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

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 * questions.

 */

/* @test

 * @bug 4313887 6838333 6865748

 * @summary Unit test for java.nio.file.Files for miscellenous cases not

 *   covered by other tests

 * @library ..

 */

import java.nio.file.*;

import java.nio.file.attribute.Attributes;

import java.nio.file.attribute.BasicFileAttributes;

import java.io.IOException;

import java.util.*;

public class Misc {

    static void npeExpected() {

        throw new RuntimeException("NullPointerException expected");

    }

    public static void main(String[] args) throws IOException {

        // -- Files.createDirectories --

        Path dir = TestUtil.createTemporaryDirectory();

        try {

            // no-op

            Files.createDirectories(dir);

            // create one directory

            Path subdir = dir.resolve("a");

            Files.createDirectories(subdir);

            if (!subdir.exists())

                throw new RuntimeException("directory not created");

            // create parents

            subdir = subdir.resolve("b/c/d");

            Files.createDirectories(subdir);

            if (!subdir.exists())

                throw new RuntimeException("directory not created");

            // existing file is not a directory

            Path file = dir.resolve("x").createFile();

            try {

                Files.createDirectories(file);

                throw new RuntimeException("failure expected");

            } catch (FileAlreadyExistsException x) { }

            try {

                Files.createDirectories(file.resolve("y"));

                throw new RuntimeException("failure expected");

            } catch (IOException x) { }

        } finally {

            TestUtil.removeAll(dir);

        }

        // --- NullPointerException --

        try {

            Files.probeContentType(null);

            npeExpected();

        } catch (NullPointerException e) {

        }

        try {

            Files.walkFileTree(null, EnumSet.noneOf(FileVisitOption.class),

                Integer.MAX_VALUE, new SimpleFileVisitor<Path>(){});

            npeExpected();

        } catch (NullPointerException e) {

        }

        try {

            Files.walkFileTree(Paths.get("."), null, Integer.MAX_VALUE,

                new SimpleFileVisitor<Path>(){});

            npeExpected();

        } catch (NullPointerException e) {

        }

        try {

            Files.walkFileTree(Paths.get("."), EnumSet.noneOf(FileVisitOption.class),

                -1, new SimpleFileVisitor<Path>(){});

            throw new RuntimeException("IllegalArgumentExpected expected");

        } catch (IllegalArgumentException e) {

        }

        try {

            Set<FileVisitOption> opts = new HashSet<FileVisitOption>(1);

            opts.add(null);

            Files.walkFileTree(Paths.get("."), opts, Integer.MAX_VALUE,

                new SimpleFileVisitor<Path>(){});

            npeExpected();

        } catch (NullPointerException e) {

        }

        try {

            Files.walkFileTree(Paths.get("."), EnumSet.noneOf(FileVisitOption.class),

                Integer.MAX_VALUE, null);

            npeExpected();

        } catch (NullPointerException e) {

        }

        SimpleFileVisitor<Path> visitor = new SimpleFileVisitor<Path>() { };

        boolean ranTheGauntlet = false;

        BasicFileAttributes attrs = Attributes.readBasicFileAttributes(Paths.get("."));

        try { visitor.preVisitDirectory(null, attrs);

        } catch (NullPointerException x0) {

        try { visitor.preVisitDirectory(dir, null);

        } catch (NullPointerException x1) {

        try { visitor.visitFile(null, attrs);

        } catch (NullPointerException x2) {

        try {  visitor.visitFile(dir, null);

        } catch (NullPointerException x3) {

        try { visitor.visitFileFailed(null, new IOException());

        } catch (NullPointerException x4) {

        try { visitor.visitFileFailed(dir, null);

        } catch (NullPointerException x5) {

        try { visitor.postVisitDirectory(null, new IOException());

        } catch (NullPointerException x6) {

            // if we get here then all visit* methods threw NPE as expected

            ranTheGauntlet = true;

        }}}}}}}

        if (!ranTheGauntlet)

            throw new RuntimeException("A visit method did not throw NPE");

    }

}