fixup! [AIRFLOW-4438] Add Gzip compression to S3_hook (#7680)

tests/hooks/test_s3_hook.py

@@ -19,7 +19,7 @@
 #
 
 import gzip as gz
-
+import io
 import mock
 import tempfile
 import unittest
@@ -271,12 +271,12 @@ def test_load_string(self):
 
     @mock_s3
     def test_load_string_acl(self):
-        hook = S3Hook()
+        hook = S3Hook(aws_conn_id=None)
         conn = hook.get_conn()
         # We need to create the bucket since this is all in Moto's 'virtual'
         # AWS account
         conn.create_bucket(Bucket="mybucket")
-        hook.load_string("Contént", "my_key", "mybucket",
+        hook.load_string(u"Contént", "my_key", "mybucket",
                          acl_policy='public-read')
         response = boto3.client('s3').get_object_acl(Bucket="mybucket",
                                                      Key="my_key", RequestPayer='requester')
@@ -325,7 +325,8 @@ def test_load_file_gzip(self):
             temp_file.seek(0)
             hook.load_file(temp_file, "my_key", 'mybucket', gzip=True)
             resource = boto3.resource('s3').Object('mybucket', 'my_key')  # pylint: disable=no-member
-            assert gz.decompress(resource.get()['Body'].read()) == b'Content'
+            with gz.GzipFile(fileobj=io.BytesIO(resource.get()['Body'].read())) as gzfile:
+                assert gzfile.read() == b'Content'
 
     @mock_s3
     def test_load_file_acl(self):