dramaticlly commented on code in PR #5332: URL: https://github.com/apache/iceberg/pull/5332#discussion_r927895916
########## python/tests/io/test_s3fs.py: ########## @@ -0,0 +1,194 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +import uuid + +import pytest + +from pyiceberg.io import s3fs + + [email protected] +def test_s3fs_new_input_file(s3fs_fileio): + """Test creating a new input file from an S3fsFileIO""" + filename = str(uuid.uuid4()) + + input_file = s3fs_fileio.new_input(f"s3://testbucket/{filename}") + + assert isinstance(input_file, s3fs.S3fsInputFile) + assert input_file.location == f"s3://testbucket/{filename}" + + [email protected] +def test_s3fs_new_output_file(s3fs_fileio): + """Test creating a new output file from an S3fsFileIO""" + filename = str(uuid.uuid4()) + + output_file = s3fs_fileio.new_output(f"s3://testbucket/{filename}") + + assert isinstance(output_file, s3fs.S3fsOutputFile) + assert output_file.location == f"s3://testbucket/{filename}" + + [email protected] +def test_s3fs_write_and_read_file(s3fs_fileio): + """Test writing and reading a file using S3fsInputFile and S3fsOutputFile""" + filename = str(uuid.uuid4()) + output_file = s3fs_fileio.new_output(location=f"s3://testbucket/{filename}") + f = output_file.create() + f.write(b"foo") + f.close() + + input_file = s3fs_fileio.new_input(f"s3://testbucket/{filename}") + assert input_file.open().read() == b"foo" + + s3fs_fileio.delete(input_file) + + [email protected] +def test_getting_length_of_file(s3fs_fileio): + """Test getting the length of an S3fsInputFile and S3fsOutputFile""" + filename = str(uuid.uuid4()) + + output_file = s3fs_fileio.new_output(location=f"s3://testbucket/{filename}") + f = output_file.create() + f.write(b"foobar") + f.close() + assert len(output_file) == 6 + + input_file = s3fs_fileio.new_input(location=f"s3://testbucket/{filename}") + assert len(input_file) == 6 + + s3fs_fileio.delete(output_file) + + [email protected] +def test_s3fs_tell(s3fs_fileio): + """Test finding cursor position for an S3fsInputFile""" + + filename = str(uuid.uuid4()) + + output_file = s3fs_fileio.new_output(location=f"s3://testbucket/{filename}") + f = output_file.create() + f.write(b"foobar") + f.close() + + input_file = s3fs_fileio.new_input(location=f"s3://testbucket/{filename}") + f = input_file.open() + + f.seek(0) + assert f.tell() == 0 + f.seek(1) + assert f.tell() == 1 + f.seek(3) + assert f.tell() == 3 + f.seek(0) + assert f.tell() == 0 + + [email protected] +def test_s3fs_read_specified_bytes(s3fs_fileio): + """Test reading a specified number of bytes from an S3fsInputFile""" + + filename = str(uuid.uuid4()) + output_file = s3fs_fileio.new_output(location=f"s3://testbucket/{filename}") + f = output_file.create() + f.write(b"foo") + f.close() + + input_file = s3fs_fileio.new_input(location=f"s3://testbucket/{filename}") + f = input_file.open() + + f.seek(0) + assert b"f" == f.read(size=1) + f.seek(0) + assert b"fo" == f.read(size=2) + f.seek(1) + assert b"o" == f.read(size=1) + f.seek(1) + assert b"oo" == f.read(size=2) + f.seek(0) + assert b"foo" == f.read(size=999) # test reading amount larger than entire content length + + s3fs_fileio.delete(input_file) + + [email protected] +def test_raise_on_opening_an_s3_file_not_found(s3fs_fileio): + """Test that an S3fsInputFile raises appropriately when the file is not found""" + + filename = str(uuid.uuid4()) + input_file = s3fs_fileio.new_input(location=f"s3://testbucket/{filename}") + with pytest.raises(FileNotFoundError) as exc_info: + input_file.open().read() + + assert filename in str(exc_info.value) + + [email protected] +def test_checking_if_a_file_exists(s3fs_fileio): + """Test checking if a file exists""" + + non_existent_file = s3fs_fileio.new_input(location="s3://testbucket/does-not-exist.txt") + assert not non_existent_file.exists() + + filename = str(uuid.uuid4()) + output_file = s3fs_fileio.new_output(location=f"s3://testbucket/{filename}") Review Comment: nit: maybe we can also assert `output_file` does not exist before it get created? -- This is an automated message from the Apache Git Service. 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