Implement FileSystemRegistry.listRoots.

java/custom/javax/microedition/io/file/FileSystemRegistry.java

@@ -18,8 +18,9 @@ public class FileSystemRegistry {
     }
 
     public static Enumeration listRoots() {
-        System.out.println("FileSystemRegistry::listRoots() not implemented.");
-        return new Vector().elements();
+        Vector roots = new Vector();
+        roots.addElement("");
+        return roots.elements();
     }
 }
 

tests/automation.js

@@ -44,7 +44,7 @@ casper.test.begin("unit tests", 7 + gfxTests.length, function(test) {
     function basicUnitTests() {
         casper.waitForText("DONE", function() {
             var content = this.getPageContent();
-            if (content.contains("DONE: 71085 pass, 0 fail, 180 known fail, 0 unknown pass")) {
+            if (content.contains("DONE: 71087 pass, 0 fail, 180 known fail, 0 unknown pass")) {
                 test.pass('main unit tests');
             } else {
                 this.debugPage();

tests/javax/microedition/io/file/TestFileSystemRegistry.java

@@ -0,0 +1,29 @@
+package javax.microedition.io.file;
+
+import gnu.testlet.TestHarness;
+import gnu.testlet.Testlet;
+import java.io.IOException;
+import java.util.Enumeration;
+import javax.microedition.io.Connector;
+
+public class TestFileSystemRegistry implements Testlet {
+
+    public void test(TestHarness th) {
+        try {
+            testListRoots(th);
+        } catch (Throwable e) {
+            th.todo(false, "Unexpected exception: " + e);
+            e.printStackTrace();
+        }
+    }
+
+    public void testListRoots(TestHarness th) throws IOException {
+        Enumeration rootEnum = FileSystemRegistry.listRoots();
+        th.check(rootEnum != null);
+        while (rootEnum.hasMoreElements()) {
+            String root = (String)rootEnum.nextElement();
+            FileConnection fc = (FileConnection)Connector.open("file:///" + root);
+            th.check(fc != null);
+        }
+    }
+}