def test_tell(self): filename = 'test_tell' contents = 100 * '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_tell(self):
filename = 'test_tell'
contents = 100 * '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_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)
def test_read(self):
filename = 'test_read'
contents = ""
for i in range(1, 256):
contents += str(i)
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('', empty_file)
empty_file = fp.read()
self.assertEqual('', empty_file)
def test_read(self):
filename = 'test_read'
contents = ""
for i in range(1, 256):
contents += str(i)
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('', empty_file)
empty_file = fp.read()
self.assertEqual('', empty_file)
def test_seek(self):
"""Tests seeking in a FilePart."""
filename = 'test_seek'
contents = 100 * '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_seek(self):
filename = 'test_seek'
contents = 100 * '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())
