/*

 * 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 6873621 6979526 7006126 7020517

 * @summary Unit test for java.nio.file.FileStore

 * @library ..

 */

import java.nio.file.*;

import java.nio.file.attribute.*;

import java.io.File;

import java.io.IOException;

import java.util.*;

public class Basic {

    static final long G = 1024L * 1024L * 1024L;

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

        Path dir = TestUtil.createTemporaryDirectory();

        try {

            doTests(dir);

        } finally {

            TestUtil.removeAll(dir);

        }

    }

    static void assertTrue(boolean okay) {

        if (!okay)

            throw new RuntimeException("Assertion failed");

    }

    static void checkWithin1GB(long value1, long value2) {

        long diff = Math.abs(value1 - value2);

        if (diff > G)

            throw new RuntimeException("values differ by more than 1GB");

    }

    static void doTests(Path dir) throws IOException {

        /**

         * Test: Directory should be on FileStore that is writable

         */

        assertTrue(!Files.getFileStore(dir).isReadOnly());

        /**

         * Test: Two files should have the same FileStore

         */

        Path file1 = Files.createFile(dir.resolve("foo"));

        Path file2 = Files.createFile(dir.resolve("bar"));

        FileStore store1 = Files.getFileStore(file1);

        FileStore store2 = Files.getFileStore(file2);

        assertTrue(store1.equals(store2));

        assertTrue(store2.equals(store1));

        assertTrue(store1.hashCode() == store2.hashCode());

        /**

         * Test: File and FileStore attributes

         */

        assertTrue(store1.supportsFileAttributeView("basic"));

        assertTrue(store1.supportsFileAttributeView(BasicFileAttributeView.class));

        assertTrue(store1.supportsFileAttributeView("posix") ==

            store1.supportsFileAttributeView(PosixFileAttributeView.class));

        assertTrue(store1.supportsFileAttributeView("dos") ==

            store1.supportsFileAttributeView(DosFileAttributeView.class));

        assertTrue(store1.supportsFileAttributeView("acl") ==

            store1.supportsFileAttributeView(AclFileAttributeView.class));

        assertTrue(store1.supportsFileAttributeView("user") ==

            store1.supportsFileAttributeView(UserDefinedFileAttributeView.class));

        /**

         * Test: Space atributes

         */

        File f = file1.toFile();

        long total = f.getTotalSpace();

        long free = f.getFreeSpace();

        long usable = f.getUsableSpace();

        // check values are "close"

        checkWithin1GB(total,  store1.getTotalSpace());

        checkWithin1GB(free,   store1.getUnallocatedSpace());

        checkWithin1GB(usable, store1.getUsableSpace());

        // get values by name

        checkWithin1GB(total,  (Long)store1.getAttribute("totalSpace"));

        checkWithin1GB(free,   (Long)store1.getAttribute("unallocatedSpace"));

        checkWithin1GB(usable, (Long)store1.getAttribute("usableSpace"));

        /**

         * Test: Enumerate all FileStores

         */

        FileStore prev = null;

        for (FileStore store: FileSystems.getDefault().getFileStores()) {

            System.out.format("%s (name=%s type=%s)\n", store, store.name(),

                store.type());

            // check space attributes are accessible

            store.getTotalSpace();

            store.getUnallocatedSpace();

            store.getUsableSpace();

            // two distinct FileStores should not be equal

            assertTrue(!store.equals(prev));

            prev = store;

        }

    }

}