FileSystemRootTest.java

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 * version 2 for more details (a copy is included in the LICENSE file that
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 8194044
 * @summary Test if Win32ShellFolder2 root folder object gets identified as such.
 * @requires os.family=="windows"
 * @modules java.desktop/sun.awt.shell
 * @run main FileSystemRootTest
 */

import sun.awt.shell.ShellFolder;
import javax.swing.filechooser.FileSystemView;
import java.io.File;

public class FileSystemRootTest {
    public static void main(String[] args) throws Exception {
        FileSystemView fileSystemView = FileSystemView.getFileSystemView();

        /*
         * This is the only way to get the Win32ShellFolder2 object, since
         * it is an internal class, which cannot be instantiated directly.
         * On windows, this returns "C:\Users\<user-name>\Documents"
         */
        File def = fileSystemView.getDefaultDirectory();
        File root = fileSystemView.getParentDirectory(
                        fileSystemView.getParentDirectory(
                            fileSystemView.getParentDirectory(def)));

        if (! (root instanceof ShellFolder && ShellFolder.isFileSystemRoot(root))) {
            throw new RuntimeException("Test failed: root drive reported as false");
        }

        if (fileSystemView.getSystemDisplayName(root).isEmpty()) {
            throw new RuntimeException("Root drive display name is empty.");
        }
    }
}