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opt/gsutil/gslib/tests/test_file_part.py 0000644 00000006605 15025252636 0014512 0 ustar 00 # -*- coding: utf-8 -*- # Copyright 2013 Google Inc. All Rights Reserved. # # Licensed 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. """Unit tests for FilePart class.""" from __future__ import absolute_import from __future__ import print_function from __future__ import division from __future__ import unicode_literals import os from gslib.file_part import FilePart import gslib.tests.testcase as testcase # pylint: disable=protected-access class TestFilePart(testcase.GsUtilUnitTestCase): """Unit tests for FilePart class.""" def test_tell(self): filename = 'test_tell' contents = 100 * b'x' fpath = self.CreateTempFile(file_name=filename, contents=contents) part_length = 23 start_pos = 50 fp = FilePart(fpath, start_pos, part_length) self.assertEqual(start_pos, fp._fp.tell()) self.assertEqual(0, fp.tell()) def test_seek(self): """Tests seeking in a FilePart.""" filename = 'test_seek' contents = 100 * b'x' part_length = 23 start_pos = 50 fpath = self.CreateTempFile(file_name=filename, contents=contents) fp = FilePart(fpath, start_pos, part_length) offset = 10 # Absolute positioning. fp.seek(offset) self.assertEqual(start_pos + offset, fp._fp.tell()) self.assertEqual(offset, fp.tell()) # Relative positioning. fp.seek(offset, whence=os.SEEK_CUR) self.assertEqual(start_pos + 2 * offset, fp._fp.tell()) self.assertEqual(2 * offset, fp.tell()) # Absolute positioning from EOF. fp.seek(-offset, whence=os.SEEK_END) self.assertEqual(start_pos + part_length - offset, fp._fp.tell()) self.assertEqual(part_length - offset, fp.tell()) # Seek past EOF. fp.seek(1, whence=os.SEEK_END) self.assertEqual(start_pos + part_length + 1, fp._fp.tell()) self.assertEqual(part_length + 1, fp.tell()) def test_read(self): """Tests various reaad operations with FilePart.""" filename = 'test_read' contents = bytearray(range(256)) part_length = 23 start_pos = 50 fpath = self.CreateTempFile(file_name=filename, contents=contents) # Read in the whole file. fp = FilePart(fpath, start_pos, part_length) whole_file = fp.read() self.assertEqual(contents[start_pos:(start_pos + part_length)], whole_file) # Read in a piece of the file from the beginning. fp.seek(0) offset = 10 partial_file = fp.read(offset) self.assertEqual(contents[start_pos:(start_pos + offset)], partial_file) # Read in the rest of the file. remaining_file = fp.read(part_length - offset) self.assertEqual(contents[(start_pos + offset):(start_pos + part_length)], remaining_file) self.assertEqual(contents[start_pos:(start_pos + part_length)], partial_file + remaining_file) # Try to read after reaching EOF. empty_file = fp.read(100) self.assertEqual(b'', empty_file) empty_file = fp.read() self.assertEqual(b'', empty_file)
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