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test_serializer.py
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test_serializer.py
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from __future__ import absolute_import, division, unicode_literals
import os
import json
import pytest
from .support import get_data_files
from html5lib import constants
from html5lib.filters.lint import Filter as Lint
from html5lib.serializer import HTMLSerializer, serialize
from html5lib.treewalkers.base import TreeWalker
# pylint:disable=wrong-import-position
optionals_loaded = []
try:
from lxml import etree
optionals_loaded.append("lxml")
except ImportError:
pass
# pylint:enable=wrong-import-position
default_namespace = constants.namespaces["html"]
class JsonWalker(TreeWalker):
def __iter__(self):
for token in self.tree:
type = token[0]
if type == "StartTag":
if len(token) == 4:
namespace, name, attrib = token[1:4]
else:
namespace = default_namespace
name, attrib = token[1:3]
yield self.startTag(namespace, name, self._convertAttrib(attrib))
elif type == "EndTag":
if len(token) == 3:
namespace, name = token[1:3]
else:
namespace = default_namespace
name = token[1]
yield self.endTag(namespace, name)
elif type == "EmptyTag":
if len(token) == 4:
namespace, name, attrib = token[1:]
else:
namespace = default_namespace
name, attrib = token[1:]
for token in self.emptyTag(namespace, name, self._convertAttrib(attrib)):
yield token
elif type == "Comment":
yield self.comment(token[1])
elif type in ("Characters", "SpaceCharacters"):
for token in self.text(token[1]):
yield token
elif type == "Doctype":
if len(token) == 4:
yield self.doctype(token[1], token[2], token[3])
elif len(token) == 3:
yield self.doctype(token[1], token[2])
else:
yield self.doctype(token[1])
else:
raise ValueError("Unknown token type: " + type)
def _convertAttrib(self, attribs):
"""html5lib tree-walkers use a dict of (namespace, name): value for
attributes, but JSON cannot represent this. Convert from the format
in the serializer tests (a list of dicts with "namespace", "name",
and "value" as keys) to html5lib's tree-walker format."""
attrs = {}
for attrib in attribs:
name = (attrib["namespace"], attrib["name"])
assert(name not in attrs)
attrs[name] = attrib["value"]
return attrs
def serialize_html(input, options):
options = {str(k): v for k, v in options.items()}
encoding = options.get("encoding", None)
if "encoding" in options:
del options["encoding"]
stream = Lint(JsonWalker(input), False)
serializer = HTMLSerializer(alphabetical_attributes=True, **options)
return serializer.render(stream, encoding)
def throwsWithLatin1(input):
with pytest.raises(UnicodeEncodeError):
serialize_html(input, {"encoding": "iso-8859-1"})
def testDoctypeName():
throwsWithLatin1([["Doctype", "\u0101"]])
def testDoctypePublicId():
throwsWithLatin1([["Doctype", "potato", "\u0101"]])
def testDoctypeSystemId():
throwsWithLatin1([["Doctype", "potato", "potato", "\u0101"]])
def testCdataCharacters():
test_serializer([["StartTag", "http:https://www.w3.org/1999/xhtml", "style", {}], ["Characters", "\u0101"]],
["<style>ā"], {"encoding": "iso-8859-1"})
def testCharacters():
test_serializer([["Characters", "\u0101"]],
["ā"], {"encoding": "iso-8859-1"})
def testStartTagName():
throwsWithLatin1([["StartTag", "http:https://www.w3.org/1999/xhtml", "\u0101", []]])
def testAttributeName():
throwsWithLatin1([["StartTag", "http:https://www.w3.org/1999/xhtml", "span", [{"namespace": None, "name": "\u0101", "value": "potato"}]]])
def testAttributeValue():
test_serializer([["StartTag", "http:https://www.w3.org/1999/xhtml", "span",
[{"namespace": None, "name": "potato", "value": "\u0101"}]]],
["<span potato=ā>"], {"encoding": "iso-8859-1"})
def testEndTagName():
throwsWithLatin1([["EndTag", "http:https://www.w3.org/1999/xhtml", "\u0101"]])
def testComment():
throwsWithLatin1([["Comment", "\u0101"]])
def testThrowsUnknownOption():
with pytest.raises(TypeError):
HTMLSerializer(foobar=None)
@pytest.mark.parametrize("c", list("\t\n\u000C\x20\r\"'=<>`"))
def testSpecQuoteAttribute(c):
input_ = [["StartTag", "http:https://www.w3.org/1999/xhtml", "span",
[{"namespace": None, "name": "foo", "value": c}]]]
if c == '"':
output_ = ["<span foo='%s'>" % c]
else:
output_ = ['<span foo="%s">' % c]
options_ = {"quote_attr_values": "spec"}
test_serializer(input_, output_, options_)
@pytest.mark.parametrize("c", list("\t\n\u000C\x20\r\"'=<>`"
"\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n"
"\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15"
"\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"
"\x20\x2f\x60\xa0\u1680\u180e\u180f\u2000"
"\u2001\u2002\u2003\u2004\u2005\u2006\u2007"
"\u2008\u2009\u200a\u2028\u2029\u202f\u205f"
"\u3000"))
def testLegacyQuoteAttribute(c):
input_ = [["StartTag", "http:https://www.w3.org/1999/xhtml", "span",
[{"namespace": None, "name": "foo", "value": c}]]]
if c == '"':
output_ = ["<span foo='%s'>" % c]
else:
output_ = ['<span foo="%s">' % c]
options_ = {"quote_attr_values": "legacy"}
test_serializer(input_, output_, options_)
@pytest.fixture
def lxml_parser():
return etree.XMLParser(resolve_entities=False)
@pytest.mark.skipif("lxml" not in optionals_loaded, reason="lxml not importable")
def testEntityReplacement(lxml_parser):
doc = '<!DOCTYPE html SYSTEM "about:legacy-compat"><html>β</html>'
tree = etree.fromstring(doc, parser=lxml_parser).getroottree()
result = serialize(tree, tree="lxml", omit_optional_tags=False)
assert result == '<!DOCTYPE html SYSTEM "about:legacy-compat"><html>\u03B2</html>'
@pytest.mark.skipif("lxml" not in optionals_loaded, reason="lxml not importable")
def testEntityXML(lxml_parser):
doc = '<!DOCTYPE html SYSTEM "about:legacy-compat"><html>></html>'
tree = etree.fromstring(doc, parser=lxml_parser).getroottree()
result = serialize(tree, tree="lxml", omit_optional_tags=False)
assert result == '<!DOCTYPE html SYSTEM "about:legacy-compat"><html>></html>'
@pytest.mark.skipif("lxml" not in optionals_loaded, reason="lxml not importable")
def testEntityNoResolve(lxml_parser):
doc = '<!DOCTYPE html SYSTEM "about:legacy-compat"><html>β</html>'
tree = etree.fromstring(doc, parser=lxml_parser).getroottree()
result = serialize(tree, tree="lxml", omit_optional_tags=False,
resolve_entities=False)
assert result == '<!DOCTYPE html SYSTEM "about:legacy-compat"><html>β</html>'
def param_serializer():
for filename in get_data_files('serializer-testdata', '*.test', os.path.dirname(__file__)):
with open(filename) as fp:
tests = json.load(fp)
for test in tests['tests']:
yield test["input"], test["expected"], test.get("options", {})
@pytest.mark.parametrize("input, expected, options", param_serializer())
def test_serializer(input, expected, options):
encoding = options.get("encoding", None)
if encoding:
expected = list(map(lambda x: x.encode(encoding), expected))
result = serialize_html(input, options)
if len(expected) == 1:
assert expected[0] == result, "Expected:\n%s\nActual:\n%s\nOptions:\n%s" % (expected[0], result, str(options))
elif result not in expected:
assert False, "Expected: %s, Received: %s" % (expected, result)