pitrou commented on a change in pull request #9996:
URL: https://github.com/apache/arrow/pull/9996#discussion_r614091530



##########
File path: python/pyarrow/tests/test_fs.py
##########
@@ -1052,6 +1052,50 @@ def test_s3_options(monkeypatch):
         )
 
 
[email protected]
+def test_s3_proxy_options(monkeypatch):
+    from pyarrow.fs import S3FileSystem
+
+    # Avoid wait for unavailable metadata server in ARN role example below
+    monkeypatch.setenv("AWS_EC2_METADATA_DISABLED", "true")

Review comment:
       Doesn't seem useful? There's no ARN role example below :-)

##########
File path: python/pyarrow/tests/test_fs.py
##########
@@ -1052,6 +1052,50 @@ def test_s3_options(monkeypatch):
         )
 
 
[email protected]
+def test_s3_proxy_options(monkeypatch):
+    from pyarrow.fs import S3FileSystem
+
+    # Avoid wait for unavailable metadata server in ARN role example below
+    monkeypatch.setenv("AWS_EC2_METADATA_DISABLED", "true")
+
+    # Check dict case for 'proxy_options'
+    fs1 = S3FileSystem(proxy_options={'scheme': 'http', 'host': 'localhost',
+                                      'port': 8999})
+    assert isinstance(fs1, S3FileSystem)
+    assert pickle.loads(pickle.dumps(fs1)) == fs1
+
+    # Check str case for 'proxy_options'
+    fs2 = S3FileSystem(proxy_options='http://localhost:9000')
+    assert isinstance(fs2, S3FileSystem)
+    assert pickle.loads(pickle.dumps(fs2)) == fs2
+

Review comment:
       Can you check inequality between two different set of proxy options?
   Can you also check equality of equivalent proxy options create from a dict 
or a URI?




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