The in-memory file system "memFS:" now has limitted support for directories.

h2/src/test/org/h2/test/unit/TestFileSystem.java

@@ -44,6 +44,7 @@ public class TestFileSystem extends TestBase {
     }
 
     public void test() throws Exception {
+        testMemFsDir();
         testClasspath();
         FileSystemCrypt.register();
         // DebugFileSystem.register().setTrace(true);
@@ -83,6 +84,15 @@ public class TestFileSystem extends TestBase {
         }
     }
 
+    private void testMemFsDir() throws IOException {
+        String dir = "memFS:data/test";
+        FileSystem fs = FileSystem.getInstance(dir);
+        fs.openFileOutputStream("memFS:data/test/a.txt", false).close();
+        String[] list = fs.listFiles("memFS:data/test");
+        assertEquals(1, list.length);
+        fs.deleteRecursive("memFS:", false);
+    }
+
     private void testClasspath() throws IOException {
         String resource = "org/h2/test/testSimple.in.txt";
         InputStream in;