/
test_serializer.py
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/
test_serializer.py
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from __future__ import absolute_import, division, unicode_literals
import json
import unittest
from .support import get_data_files
try:
unittest.TestCase.assertEqual
except AttributeError:
unittest.TestCase.assertEqual = unittest.TestCase.assertEquals
import html5lib
from html5lib import constants
from html5lib.serializer import HTMLSerializer, serialize
from html5lib.treewalkers._base import TreeWalker
optionals_loaded = []
try:
from lxml import etree
optionals_loaded.append("lxml")
except ImportError:
pass
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 = dict([(str(k), v) for k, v in options.items()])
stream = JsonWalker(input)
serializer = HTMLSerializer(alphabetical_attributes=True, **options)
return serializer.render(stream, options.get("encoding", None))
def runSerializerTest(input, expected, options):
encoding = options.get("encoding", None)
if encoding:
encode = lambda x: x.encode(encoding)
expected = list(map(encode, 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)
class EncodingTestCase(unittest.TestCase):
def throwsWithLatin1(self, input):
self.assertRaises(UnicodeEncodeError, serialize_html, input, {"encoding": "iso-8859-1"})
def testDoctypeName(self):
self.throwsWithLatin1([["Doctype", "\u0101"]])
def testDoctypePublicId(self):
self.throwsWithLatin1([["Doctype", "potato", "\u0101"]])
def testDoctypeSystemId(self):
self.throwsWithLatin1([["Doctype", "potato", "potato", "\u0101"]])
def testCdataCharacters(self):
runSerializerTest([["StartTag", "http://www.w3.org/1999/xhtml", "style", {}], ["Characters", "\u0101"]],
["<style>ā"], {"encoding": "iso-8859-1"})
def testCharacters(self):
runSerializerTest([["Characters", "\u0101"]],
["ā"], {"encoding": "iso-8859-1"})
def testStartTagName(self):
self.throwsWithLatin1([["StartTag", "http://www.w3.org/1999/xhtml", "\u0101", []]])
def testEmptyTagName(self):
self.throwsWithLatin1([["EmptyTag", "http://www.w3.org/1999/xhtml", "\u0101", []]])
def testAttributeName(self):
self.throwsWithLatin1([["StartTag", "http://www.w3.org/1999/xhtml", "span", [{"namespace": None, "name": "\u0101", "value": "potato"}]]])
def testAttributeValue(self):
runSerializerTest([["StartTag", "http://www.w3.org/1999/xhtml", "span",
[{"namespace": None, "name": "potato", "value": "\u0101"}]]],
["<span potato=ā>"], {"encoding": "iso-8859-1"})
def testEndTagName(self):
self.throwsWithLatin1([["EndTag", "http://www.w3.org/1999/xhtml", "\u0101"]])
def testComment(self):
self.throwsWithLatin1([["Comment", "\u0101"]])
if "lxml" in optionals_loaded:
class LxmlTestCase(unittest.TestCase):
def setUp(self):
self.parser = etree.XMLParser(resolve_entities=False)
self.treewalker = html5lib.getTreeWalker("lxml")
self.serializer = HTMLSerializer()
def testEntityReplacement(self):
doc = """<!DOCTYPE html SYSTEM "about:legacy-compat"><html>β</html>"""
tree = etree.fromstring(doc, parser=self.parser).getroottree()
result = serialize(tree, tree="lxml", omit_optional_tags=False)
self.assertEqual("""<!DOCTYPE html SYSTEM "about:legacy-compat"><html>\u03B2</html>""", result)
def testEntityXML(self):
doc = """<!DOCTYPE html SYSTEM "about:legacy-compat"><html>></html>"""
tree = etree.fromstring(doc, parser=self.parser).getroottree()
result = serialize(tree, tree="lxml", omit_optional_tags=False)
self.assertEqual("""<!DOCTYPE html SYSTEM "about:legacy-compat"><html>></html>""", result)
def testEntityNoResolve(self):
doc = """<!DOCTYPE html SYSTEM "about:legacy-compat"><html>β</html>"""
tree = etree.fromstring(doc, parser=self.parser).getroottree()
result = serialize(tree, tree="lxml", omit_optional_tags=False,
resolve_entities=False)
self.assertEqual("""<!DOCTYPE html SYSTEM "about:legacy-compat"><html>β</html>""", result)
def test_serializer():
for filename in get_data_files('serializer', '*.test'):
with open(filename) as fp:
tests = json.load(fp)
for index, test in enumerate(tests['tests']):
yield runSerializerTest, test["input"], test["expected"], test.get("options", {})