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# -*- coding: utf-8 -*-
#
# Copyright (C) 2019 Radim Rehurek <me@radimrehurek.com>
#
# This code is distributed under the terms and conditions
# from the MIT License (MIT).
#
import io
import random
import unittest
import smart_open.bytebuffer
CHUNK_SIZE = 1024
def int2byte(i):
return bytes((i, ))
def random_byte_string(length=CHUNK_SIZE):
rand_bytes = [int2byte(random.randint(0, 255)) for _ in range(length)]
return b''.join(rand_bytes)
def bytebuffer_and_random_contents():
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
contents = random_byte_string(CHUNK_SIZE)
content_reader = io.BytesIO(contents)
buf.fill(content_reader)
return [buf, contents]
class ByteBufferTest(unittest.TestCase):
def test_len(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
self.assertEqual(len(buf), 0)
contents = b'foo bar baz'
buf._bytes = contents
self.assertEqual(len(buf), len(contents))
pos = 4
buf._pos = pos
self.assertEqual(len(buf), len(contents) - pos)
def test_fill_from_reader(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
contents = random_byte_string(CHUNK_SIZE)
content_reader = io.BytesIO(contents)
bytes_filled = buf.fill(content_reader)
self.assertEqual(bytes_filled, CHUNK_SIZE)
self.assertEqual(len(buf), CHUNK_SIZE)
self.assertEqual(buf._bytes, contents)
def test_fill_from_iterable(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
contents = random_byte_string(CHUNK_SIZE)
contents_iter = (contents[i:i+8] for i in range(0, CHUNK_SIZE, 8))
bytes_filled = buf.fill(contents_iter)
self.assertEqual(bytes_filled, CHUNK_SIZE)
self.assertEqual(len(buf), CHUNK_SIZE)
self.assertEqual(buf._bytes, contents)
def test_fill_from_list(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
contents = random_byte_string(CHUNK_SIZE)
contents_list = [contents[i:i+7] for i in range(0, CHUNK_SIZE, 7)]
bytes_filled = buf.fill(contents_list)
self.assertEqual(bytes_filled, CHUNK_SIZE)
self.assertEqual(len(buf), CHUNK_SIZE)
self.assertEqual(buf._bytes, contents)
def test_fill_multiple(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
long_contents = random_byte_string(CHUNK_SIZE * 4)
long_content_reader = io.BytesIO(long_contents)
first_bytes_filled = buf.fill(long_content_reader)
self.assertEqual(first_bytes_filled, CHUNK_SIZE)
second_bytes_filled = buf.fill(long_content_reader)
self.assertEqual(second_bytes_filled, CHUNK_SIZE)
self.assertEqual(len(buf), 2 * CHUNK_SIZE)
def test_fill_size(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
contents = random_byte_string(CHUNK_SIZE * 2)
content_reader = io.BytesIO(contents)
fill_size = int(CHUNK_SIZE / 2)
bytes_filled = buf.fill(content_reader, size=fill_size)
self.assertEqual(bytes_filled, fill_size)
self.assertEqual(len(buf), fill_size)
second_bytes_filled = buf.fill(content_reader, size=CHUNK_SIZE+1)
self.assertEqual(second_bytes_filled, CHUNK_SIZE)
self.assertEqual(len(buf), fill_size + CHUNK_SIZE)
def test_fill_reader_exhaustion(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
short_content_size = int(CHUNK_SIZE / 4)
short_contents = random_byte_string(short_content_size)
short_content_reader = io.BytesIO(short_contents)
bytes_filled = buf.fill(short_content_reader)
self.assertEqual(bytes_filled, short_content_size)
self.assertEqual(len(buf), short_content_size)
def test_fill_iterable_exhaustion(self):
buf = smart_open.bytebuffer.ByteBuffer(CHUNK_SIZE)
short_content_size = int(CHUNK_SIZE / 4)
short_contents = random_byte_string(short_content_size)
short_contents_iter = (short_contents[i:i+8]
for i in range(0, short_content_size, 8))
bytes_filled = buf.fill(short_contents_iter)
self.assertEqual(bytes_filled, short_content_size)
self.assertEqual(len(buf), short_content_size)
def test_empty(self):
buf, _ = bytebuffer_and_random_contents()
self.assertEqual(len(buf), CHUNK_SIZE)
buf.empty()
self.assertEqual(len(buf), 0)
def test_peek(self):
buf, contents = bytebuffer_and_random_contents()
self.assertEqual(buf.peek(), contents)
self.assertEqual(len(buf), CHUNK_SIZE)
self.assertEqual(buf.peek(64), contents[0:64])
self.assertEqual(buf.peek(CHUNK_SIZE * 10), contents)
def test_read(self):
buf, contents = bytebuffer_and_random_contents()
self.assertEqual(buf.read(), contents)
self.assertEqual(len(buf), 0)
self.assertEqual(buf.read(), b'')
def test_read_size(self):
buf, contents = bytebuffer_and_random_contents()
read_size = 128
self.assertEqual(buf.read(read_size), contents[:read_size])
self.assertEqual(len(buf), CHUNK_SIZE - read_size)
self.assertEqual(buf.read(CHUNK_SIZE*2), contents[read_size:])
self.assertEqual(len(buf), 0)
def test_readline(self):
"""Does the readline function work as expected in the simple case?"""
expected = (b'this is the very first line\n', b'and this the second')
buf = smart_open.bytebuffer.ByteBuffer()
buf.fill(io.BytesIO(b''.join(expected)))
first_line = buf.readline(b'\n')
self.assertEqual(expected[0], first_line)
second_line = buf.readline(b'\n')
self.assertEqual(expected[1], second_line)
def test_readline_middle(self):
"""Does the readline function work when we're in the middle of the buffer?"""
expected = (b'this is the very first line\n', b'and this the second')
buf = smart_open.bytebuffer.ByteBuffer()
buf.fill(io.BytesIO(b''.join(expected)))
buf.read(5)
first_line = buf.readline(b'\n')
self.assertEqual(expected[0][5:], first_line)
buf.read(5)
second_line = buf.readline(b'\n')
self.assertEqual(expected[1][5:], second_line)
def test_readline_terminator(self):
"""Does the readline function respect the terminator parameter?"""
buf = smart_open.bytebuffer.ByteBuffer()
buf.fill(io.BytesIO(b'one!two.three,'))
expected = [b'one!', b'two.', b'three,']
actual = [buf.readline(b'!'), buf.readline(b'.'), buf.readline(b',')]
self.assertEqual(expected, actual)
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