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TST: Streaming of S3 files #22520

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Merged
jreback merged 5 commits into from
Aug 29, 2018
Merged

TST: Streaming of S3 files #22520

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901837f
adding new botocore - allows for streaming
kokes Aug 27, 2018
0b74701
testing streaming of CSV files from S3
kokes Aug 27, 2018
86cc36b
skip test if botocore not installed
kokes Aug 27, 2018
16d92aa
reverting addition of a dependency
kokes Aug 27, 2018
14634b1
test docstring
kokes Aug 28, 2018
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19 changes: 19 additions & 0 deletions pandas/tests/io/test_s3.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
import pytest

from pandas import read_csv
from pandas.compat import BytesIO
from pandas.io.common import is_s3_url


Expand All @@ -6,3 +10,18 @@ class TestS3URL(object):
def test_is_s3_url(self):
assert is_s3_url("s3://pandas/somethingelse.com")
assert not is_s3_url("s4://pandas/somethingelse.com")


def test_streaming_s3_objects():
# GH17135
# botocore gained iteration support in 1.10.47, can now be used in read_*
pytest.importorskip('botocore', minversion='1.10.47')
from botocore.response import StreamingBody

data = [
b'foo,bar,baz\n1,2,3\n4,5,6\n',
b'just,the,header\n',
]
for el in data:
body = StreamingBody(BytesIO(el), content_length=len(el))
read_csv(body)