Fuchsia: Directory listing

runtime/tests/vm/dart/hello_fuchsia_test.dart

Index: runtime/tests/vm/dart/hello_fuchsia_test.dart
diff --git a/runtime/tests/vm/dart/hello_fuchsia_test.dart b/runtime/tests/vm/dart/hello_fuchsia_test.dart
index 1c36a0cf2870a9d582f21592190b68ced079df7e..bcda2bfab336050b20e3c2ecf5a6ccfaad3dd7e0 100644
--- a/runtime/tests/vm/dart/hello_fuchsia_test.dart
+++ b/runtime/tests/vm/dart/hello_fuchsia_test.dart
@@ -386,6 +386,13 @@ Future testProcess() async {
   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!");
 
@@ -417,6 +424,10 @@ main() async {
   await testGoogleHttps(null, 'pass');
   print("testGoogleHttps done");
 
+  print("lsTest");
+  await testLs("/");
+  print("lsTest done");
+
   print("testProcess");
   await testProcess();
   print("testProcess done");