Fix tests to access S3 (#896)

Summary:
Fixes failed tests as the open-sourced Dataset has changed.

Pull Request resolved: #896

Reviewed By: NivekT

Differential Revision: D41309257

Pulled By: ejguan

fbshipit-source-id: 9c106a4dc5d4541c7fe402b24b68eeb8149fdd11

Author: ejguan

test/test_remote_io.py

@@ -192,7 +192,7 @@ def _filepath_fn(url):
     @skipIfNoFSSpecS3
     def test_fsspec_io_iterdatapipe(self):
         input_list = [
-            (["s3://ai2-public-datasets"], 39),  # bucket without '/'
+            (["s3://ai2-public-datasets"], 40),  # bucket without '/'
             (["s3://ai2-public-datasets/charades/"], 18),  # bucket with '/'
             (
                 [
@@ -226,8 +226,8 @@ def test_disabled_s3_io_iterdatapipe(self):
     def test_s3_io_iterdatapipe(self):
         # S3FileLister: different inputs
         input_list = [
-            [["s3://ai2-public-datasets"], 77],  # bucket without '/'
-            [["s3://ai2-public-datasets/"], 77],  # bucket with '/'
+            [["s3://ai2-public-datasets"], 78],  # bucket without '/'
+            [["s3://ai2-public-datasets/"], 78],  # bucket with '/'
             [["s3://ai2-public-datasets/charades"], 18],  # folder without '/'
             [["s3://ai2-public-datasets/charades/"], 18],  # folder without '/'
             [["s3://ai2-public-datasets/charad"], 18],  # prefix