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test_stream.py
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test_stream.py
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from __future__ import absolute_import, division, unicode_literals
from . import support # flake8: noqa
import unittest
import codecs
from io import BytesIO
from six.moves import http_client
from html5lib.inputstream import (BufferedStream, HTMLInputStream,
HTMLUnicodeInputStream, HTMLBinaryInputStream)
class BufferedStreamTest(unittest.TestCase):
def test_basic(self):
s = b"abc"
fp = BufferedStream(BytesIO(s))
read = fp.read(10)
assert read == s
def test_read_length(self):
fp = BufferedStream(BytesIO(b"abcdef"))
read1 = fp.read(1)
assert read1 == b"a"
read2 = fp.read(2)
assert read2 == b"bc"
read3 = fp.read(3)
assert read3 == b"def"
read4 = fp.read(4)
assert read4 == b""
def test_tell(self):
fp = BufferedStream(BytesIO(b"abcdef"))
read1 = fp.read(1)
assert fp.tell() == 1
read2 = fp.read(2)
assert fp.tell() == 3
read3 = fp.read(3)
assert fp.tell() == 6
read4 = fp.read(4)
assert fp.tell() == 6
def test_seek(self):
fp = BufferedStream(BytesIO(b"abcdef"))
read1 = fp.read(1)
assert read1 == b"a"
fp.seek(0)
read2 = fp.read(1)
assert read2 == b"a"
read3 = fp.read(2)
assert read3 == b"bc"
fp.seek(2)
read4 = fp.read(2)
assert read4 == b"cd"
fp.seek(4)
read5 = fp.read(2)
assert read5 == b"ef"
def test_seek_tell(self):
fp = BufferedStream(BytesIO(b"abcdef"))
read1 = fp.read(1)
assert fp.tell() == 1
fp.seek(0)
read2 = fp.read(1)
assert fp.tell() == 1
read3 = fp.read(2)
assert fp.tell() == 3
fp.seek(2)
read4 = fp.read(2)
assert fp.tell() == 4
fp.seek(4)
read5 = fp.read(2)
assert fp.tell() == 6
class HTMLUnicodeInputStreamShortChunk(HTMLUnicodeInputStream):
_defaultChunkSize = 2
class HTMLBinaryInputStreamShortChunk(HTMLBinaryInputStream):
_defaultChunkSize = 2
class HTMLInputStreamTest(unittest.TestCase):
def test_char_ascii(self):
stream = HTMLInputStream(b"'", encoding='ascii')
self.assertEqual(stream.charEncoding[0], 'ascii')
self.assertEqual(stream.char(), "'")
def test_char_utf8(self):
stream = HTMLInputStream('\u2018'.encode('utf-8'), encoding='utf-8')
self.assertEqual(stream.charEncoding[0], 'utf-8')
self.assertEqual(stream.char(), '\u2018')
def test_char_win1252(self):
stream = HTMLInputStream("\xa9\xf1\u2019".encode('windows-1252'))
self.assertEqual(stream.charEncoding[0], 'windows-1252')
self.assertEqual(stream.char(), "\xa9")
self.assertEqual(stream.char(), "\xf1")
self.assertEqual(stream.char(), "\u2019")
def test_bom(self):
stream = HTMLInputStream(codecs.BOM_UTF8 + b"'")
self.assertEqual(stream.charEncoding[0], 'utf-8')
self.assertEqual(stream.char(), "'")
def test_utf_16(self):
stream = HTMLInputStream((' ' * 1025).encode('utf-16'))
self.assertTrue(stream.charEncoding[0] in ['utf-16-le', 'utf-16-be'], stream.charEncoding)
self.assertEqual(len(stream.charsUntil(' ', True)), 1025)
def test_newlines(self):
stream = HTMLBinaryInputStreamShortChunk(codecs.BOM_UTF8 + b"a\nbb\r\nccc\rddddxe")
self.assertEqual(stream.position(), (1, 0))
self.assertEqual(stream.charsUntil('c'), "a\nbb\n")
self.assertEqual(stream.position(), (3, 0))
self.assertEqual(stream.charsUntil('x'), "ccc\ndddd")
self.assertEqual(stream.position(), (4, 4))
self.assertEqual(stream.charsUntil('e'), "x")
self.assertEqual(stream.position(), (4, 5))
def test_newlines2(self):
size = HTMLUnicodeInputStream._defaultChunkSize
stream = HTMLInputStream("\r" * size + "\n")
self.assertEqual(stream.charsUntil('x'), "\n" * size)
def test_position(self):
stream = HTMLBinaryInputStreamShortChunk(codecs.BOM_UTF8 + b"a\nbb\nccc\nddde\nf\ngh")
self.assertEqual(stream.position(), (1, 0))
self.assertEqual(stream.charsUntil('c'), "a\nbb\n")
self.assertEqual(stream.position(), (3, 0))
stream.unget("\n")
self.assertEqual(stream.position(), (2, 2))
self.assertEqual(stream.charsUntil('c'), "\n")
self.assertEqual(stream.position(), (3, 0))
stream.unget("\n")
self.assertEqual(stream.position(), (2, 2))
self.assertEqual(stream.char(), "\n")
self.assertEqual(stream.position(), (3, 0))
self.assertEqual(stream.charsUntil('e'), "ccc\nddd")
self.assertEqual(stream.position(), (4, 3))
self.assertEqual(stream.charsUntil('h'), "e\nf\ng")
self.assertEqual(stream.position(), (6, 1))
def test_position2(self):
stream = HTMLUnicodeInputStreamShortChunk("abc\nd")
self.assertEqual(stream.position(), (1, 0))
self.assertEqual(stream.char(), "a")
self.assertEqual(stream.position(), (1, 1))
self.assertEqual(stream.char(), "b")
self.assertEqual(stream.position(), (1, 2))
self.assertEqual(stream.char(), "c")
self.assertEqual(stream.position(), (1, 3))
self.assertEqual(stream.char(), "\n")
self.assertEqual(stream.position(), (2, 0))
self.assertEqual(stream.char(), "d")
self.assertEqual(stream.position(), (2, 1))
def test_python_issue_20007(self):
"""
Make sure we have a work-around for Python bug #20007
http://bugs.python.org/issue20007
"""
class FakeSocket(object):
def makefile(self, _mode, _bufsize=None):
return BytesIO(b"HTTP/1.1 200 Ok\r\n\r\nText")
source = http_client.HTTPResponse(FakeSocket())
source.begin()
stream = HTMLInputStream(source)
self.assertEqual(stream.charsUntil(" "), "Text")
def buildTestSuite():
return unittest.defaultTestLoader.loadTestsFromName(__name__)
def main():
buildTestSuite()
unittest.main()
if __name__ == '__main__':
main()