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# -*- coding: iso-8859-1 -*-
# Copyright (C) 2004-2012 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Test html parsing.
"""
import linkcheck.HtmlParser.htmlsax
import linkcheck.HtmlParser.htmllib
from cStringIO import StringIO
import unittest
# list of tuples
# (<test pattern>, <expected parse output>)
parsetests = [
# start tags
("""<a b="c" >""", """<a b="c">"""),
("""<a b='c' >""", """<a b="c">"""),
("""<a b=c" >""", """<a b="c">"""),
("""<a b=c' >""", """<a b="c'">"""),
("""<a b="c >""", """<a b="c >"""),
("""<a b="" >""", """<a b="">"""),
("""<a b='' >""", """<a b="">"""),
("""<a b=>""", """<a b="">"""),
("""<a b= >""", """<a b="">"""),
("""<a =c>""", """<a c>"""),
("""<a =c >""", """<a c>"""),
("""<a =>""", """<a>"""),
("""<a = >""", """<a>"""),
("""<a b= "c" >""", """<a b="c">"""),
("""<a b ="c" >""", """<a b="c">"""),
("""<a b = "c" >""", """<a b="c">"""),
("""<a >""", """<a>"""),
("""< a>""", """<a>"""),
("""< a >""", """<a>"""),
("""<>""", """<>"""),
("""< >""", """< >"""),
("""<a>""", """<a>"""),
("""<a a="b">""", """<a a="b">"""),
("""<a a="b">""", """<a a="bä">"""),
# multiple attribute names should be ignored...
("""<a b="c" b="c" >""", """<a b="c">"""),
# ... but which one wins - in our implementation the last one
("""<a b="c" b="d" >""", """<a b="d">"""),
# reduce test
("""<a b="c"><""", """<a b="c"><"""),
("""d>""", """d>"""),
# numbers in tag
("""<h1>bla</h1>""", """<h1>bla</h1>"""),
# more start tags
("""<a b=c"><a b="c">""", """<a b="c"><a b="c">"""),
("""<a b=/c/></a><br>""", """<a b="/c/"></a><br>"""),
("""<br/>""", """<br>"""),
("""<a b="50%"><br>""", """<a b="50%"><br>"""),
# comments
("""<!---->< 1>""", """<!----><1>"""),
("""<!-- a - b -->< 2>""", """<!-- a - b --><2>"""),
("""<!----->< 3>""", """<!-----><3>"""),
("""<!------>< 4>""", """<!------><4>"""),
("""<!------->< 5>""", """<!-------><5>"""),
("""<!-- -->< 7>""", """<!-- --><7>"""),
("""<!---- />-->""", """<!---- />-->"""),
("""<!-- a-2 -->< 9>""", """<!-- a-2 --><9>"""),
("""<!-- --- -->< 10>""", """<!-- --- --><10>"""),
("""<!>""", """<!---->"""), # empty comment
# invalid comments
("""<!-- -- >< 8>""", """<!-- --><8>"""),
("""<!---- >< 6>""", """<!----><6>"""),
("""<!- blubb ->""", """<!-- blubb -->"""),
("""<! -- blubb -->""", """<!-- blubb -->"""),
("""<!-- blubb -- >""", """<!-- blubb -->"""),
("""<! blubb !>< a>""", """<!--blubb !--><a>"""),
("""<! blubb >< a>""", """<!--blubb --><a>"""),
# end tags
("""</a>""", """</a>"""),
("""</ a>""", """</a>"""),
("""</ a >""", """</a>"""),
("""</a >""", """</a>"""),
("""< / a>""", """</a>"""),
("""< /a>""", """</a>"""),
("""</a>""", """</a>"""),
# start and end tag (HTML doctype assumed)
("""<a/>""", """<a/>"""),
("""<meta/>""", """<meta>"""),
("""<MetA/>""", """<meta>"""),
# declaration tags
("""<!DOCtype adrbook SYSTEM "adrbook.dtd">""",
"""<!DOCTYPE adrbook SYSTEM "adrbook.dtd">"""),
# misc
("""<?xmL version="1.0" encoding="latin1"?>""",
"""<?xmL version="1.0" encoding="latin1"?>"""),
# javascript
("""<script >\n</script>""", """<script>\n</script>"""),
("""<sCrIpt lang="a">bla </a> fasel</scripT>""",
"""<script lang="a">bla </a> fasel</script>"""),
("""<script ><!--bla//-->// </script >""",
"""<script><!--bla//-->// </script>"""),
# line continuation (Dr. Fun webpage)
("""<img bo\\\nrder=0 >""", """<img border="0">"""),
("""<img align="mid\\\ndle">""", """<img align="middle">"""),
("""<img align='mid\\\ndle'>""", """<img align="middle">"""),
# href with $
("""<a href="123$456">""", """<a href="123$456">"""),
# quoting
("""<a href=/ >""", """<a href="/">"""),
("""<a href= />""", """<a href="/">"""),
("""<a href= >""", """<a href="">"""),
("""<a href="'" >""", """<a href="'">"""),
("""<a href='"' >""", """<a href=""">"""),
("""<a href="bla" %]" >""", """<a href="bla">"""),
("""<a href=bla" >""", """<a href="bla">"""),
("""<a onmouseover=blubb('nav1','',"""\
"""'/images/nav.gif',1);move(this); b="c">""",
"""<a onmouseover="blubb('nav1','',"""\
"""'/images/nav.gif',1);move(this);" b="c">"""),
("""<a onClick=location.href('/index.htm') b="c">""",
"""<a onclick="location.href('/index.htm')" b="c">"""),
# entity resolving
("""<a href="D;ailto:" >""", """<a href="ailto:">"""),
("""<a href="&ailto:" >""", """<a href="&ailto:">"""),
("""<a href="&amp;ailto:" >""", """<a href="&amp;ailto:">"""),
("""<a href="&hulla;ailto:" >""", """<a href="ailto:">"""),
("""<a href="mailto:" >""", """<a href="mailto:">"""),
("""<a href="mailto:" >""", """<a href="mailto:">"""),
# note that \u8156 is not valid encoding and therefore gets removed
("""<a href="῜ailto:" >""", """<a href="ailto:">"""),
# non-ascii characters
("""<zgr> fahr </langsamer> {""",
"""<zgr> fahr </langsamer> {"""),
# mailto link
("""<a href=mailto:calvin@LocalHost?subject=Hallo&to=michi>1</a>""",
"""<a href="mailto:calvin@LocalHost?subject=Hallo&to=michi">1</a>"""),
# doctype XHTML
("""<!DOCTYPe html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><MeTa a="b"/>""",
"""<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><meta a="b"/>"""),
# meta tag with charset encoding
("""<meta http-equiv="content-type" content>""",
"""<meta http-equiv="content-type" content>"""),
("""<meta http-equiv="content-type" content=>""",
"""<meta http-equiv="content-type" content="">"""),
("""<meta http-equiv="content-type" content="hulla">""",
"""<meta http-equiv="content-type" content="hulla">"""),
("""<meta http-equiv="content-type" content="text/html; charset=iso8859-1">""",
"""<meta http-equiv="content-type" content="text/html; charset=iso8859-1">"""),
("""<meta http-equiv="content-type" content="text/html; charset=hulla">""",
"""<meta http-equiv="content-type" content="text/html; charset=hulla">"""),
# CDATA
("""<![CDATA[<a>hallo</a>]]>""", """<![CDATA[<a>hallo</a>]]>"""),
# missing > in end tag
("""</td <td a="b" >""", """</td><td a="b">"""),
("""</td<td a="b" >""", """</td><td a="b">"""),
# missing beginning quote
("""<td a=b">""", """<td a="b">"""),
# stray < before start tag
("""<0.<td a="b" >""", """<0.<td a="b">"""),
# stray < before end tag
("""<0.</td >""", """<0.</td>"""),
# missing end quote (XXX TODO)
#("""<td a="b>\n""", """<td a="b">\n"""),
#("""<td a="b></td>\na""", """<td a="b"></td>\na"""),
#("""<a b="c><a b="c>\n""", """<a b="c"><a b="c">\n"""),
#("""<td a="b c="d"></td>\n""", """<td a="b" c="d"></td>\n"""),
# HTML5 tags
("""<audio src=bla>""", """<audio src="bla">"""),
("""<button formaction=bla>""", """<button formaction="bla">"""),
("""<html manifest=bla>""", """<html manifest="bla">"""),
("""<source src=bla>""", """<source src="bla">"""),
("""<track src=bla>""", """<track src="bla">"""),
("""<video src=bla>""", """<video src="bla">"""),
]
flushtests = [
("<", "<"),
("<a", "<a"),
("<!a", "<!a"),
("<?a", "<?a"),
]
class TestParser (unittest.TestCase):
"""
Test html parser.
"""
def setUp (self):
"""
Initialize two internal html parsers to be used for testing.
"""
self.htmlparser = linkcheck.HtmlParser.htmlsax.parser()
self.htmlparser2 = linkcheck.HtmlParser.htmlsax.parser()
def test_parse (self):
# Parse all test patterns in one go.
for _in, _out in parsetests:
out = StringIO()
handler = linkcheck.HtmlParser.htmllib.HtmlPrettyPrinter(out)
self.htmlparser.handler = handler
self.htmlparser.feed(_in)
self.check_results(self.htmlparser, _in, _out, out)
def check_results (self, htmlparser, _in, _out, out):
"""
Check parse results.
"""
htmlparser.flush()
res = out.getvalue()
msg = "Test error; in: %r, out: %r, expect: %r" % \
(_in, res, _out)
self.assertEqual(res, _out, msg=msg)
htmlparser.reset()
def test_feed (self):
# Parse all test patterns sequentially.
for _in, _out in parsetests:
out = StringIO()
handler = linkcheck.HtmlParser.htmllib.HtmlPrettyPrinter(out)
self.htmlparser.handler = handler
for c in _in:
self.htmlparser.feed(c)
self.check_results(self.htmlparser, _in, _out, out)
def test_interwoven (self):
# Parse all test patterns on two parsers interwoven.
for _in, _out in parsetests:
out = StringIO()
out2 = StringIO()
handler = linkcheck.HtmlParser.htmllib.HtmlPrettyPrinter(out)
self.htmlparser.handler = handler
handler2 = linkcheck.HtmlParser.htmllib.HtmlPrettyPrinter(out2)
self.htmlparser2.handler = handler2
for c in _in:
self.htmlparser.feed(c)
self.htmlparser2.feed(c)
self.check_results(self.htmlparser, _in, _out, out)
self.check_results(self.htmlparser2, _in, _out, out2)
def test_handler (self):
for _in, _out in parsetests:
out = StringIO()
out2 = StringIO()
handler = linkcheck.HtmlParser.htmllib.HtmlPrinter(out)
self.htmlparser.handler = handler
handler2 = linkcheck.HtmlParser.htmllib.HtmlPrinter(out2)
self.htmlparser2.handler = handler2
for c in _in:
self.htmlparser.feed(c)
self.htmlparser2.feed(c)
self.assertEqual(out.getvalue(), out2.getvalue())
def test_flush (self):
# Test parser flushing.
for _in, _out in flushtests:
out = StringIO()
handler = linkcheck.HtmlParser.htmllib.HtmlPrettyPrinter(out)
self.htmlparser.handler = handler
self.htmlparser.feed(_in)
self.check_results(self.htmlparser, _in, _out, out)
def test_entities (self):
# Test entity resolving.
resolve = linkcheck.HtmlParser.resolve_entities
for c in "abcdefghijklmnopqrstuvwxyz":
self.assertEqual(resolve("&#%d;" % ord(c)), c)
self.assertEqual(resolve("�"), u"")
def test_peek (self):
# Test peek() parser function
data = '<a href="test.html">name</a>'
class NamePeeker (object):
def start_element (self_handler, tag, attrs):
# use self reference of TestParser instance
self.assertRaises(TypeError, self.htmlparser.peek, -1)
self.assertEqual(self.htmlparser.peek(0), "")
self.assertEqual(self.htmlparser.peek(4), "name")
self.htmlparser.handler = NamePeeker()
self.htmlparser.feed(data)
def test_encoding_detection (self):
html = '<meta http-equiv="content-type" content="text/html; charset=UTF-8">'
self.encoding_test(html, "utf-8")
html = '<meta charset="UTF-8">'
self.encoding_test(html, "utf-8")
html = '<meta charset="hulla">'
self.encoding_test(html, "iso8859-1")
html = '<meta http-equiv="content-type" content="text/html; charset=blabla">'
self.encoding_test(html, "iso8859-1")
def encoding_test (self, html, expected):
parser = linkcheck.HtmlParser.htmlsax.parser()
self.assertEqual(parser.encoding, "iso8859-1")
parser.feed(html)
self.assertEqual(parser.encoding, expected)
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