Fuchsia: Directory listing

runtime/tests/vm/dart/hello_fuchsia_test.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "dart:async";
 import "dart:convert";
 import "dart:io";
 
 testAddressParse() async {
   print(new InternetAddress("1.0.2.3").rawAddress);
@@ skipping 368 matching lines @@
   }
 }
 
 Future testProcess() async {
   Process p = await Process.start(Platform.executable, ["--version"]);
   p.stderr.transform(UTF8.decoder).listen(print);
   int code = await p.exitCode;
   print("dart --version exited with code $code");
 }
 
+Future testLs(String path) async {
+  Stream<FileSystemEntity> stream = (new Directory(path)).list();
+  await for (FileSystemEntity fse in stream) {
+    print(fse.path);
+  }
+}
+
 main() async {
   print("Hello, Fuchsia!");
 
   print("testAddressParse");
   await testAddressParse();
   print("testAddressParse done");
 
   print("testSimpleBind");
   await testSimpleBind();
   print("testSimpleBind done");
@@ skipping 11 matching lines @@
   print("testSimpleReadWriteShutdown done");
 
   print("testGoogleHttp");
   await testGoogleHttp(null, 'pass');
   print("testGoogleHttp done");
 
   print("testGoogleHttps");
   await testGoogleHttps(null, 'pass');
   print("testGoogleHttps done");
 
+  print("lsTest");
+  await testLs("/");
+  print("lsTest done");
+
   print("testProcess");
   await testProcess();
   print("testProcess done");
 
   print("Goodbyte, Fuchsia!");
 }