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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()