8194044: Regression manual Test javax/swing/JFileChooser/8067660/FileChooserTest.java fails

Reviewed-by: psadhukhan, jdv, ssadetsky

src/java.desktop/windows/classes/sun/awt/shell/Win32ShellFolderManager2.java

@@ -448,7 +448,7 @@ final class Win32ShellFolderManager2 extends ShellFolderManager {
                 Win32ShellFolder2 sf = (Win32ShellFolder2)dir;
 
                 return (sf.isFileSystem() && sf.parent != null &&
-                        sf.parent.equals(Win32ShellFolder2.listRoots()));
+                        sf.parent.equals(getDrives()));
             }
             String path = dir.getPath();
 

test/jdk/javax/swing/JFileChooser/8194044/FileSystemRootTest.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2018, 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 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.");
+        }
+    }
+}