cpython/Lib/test/test_pyexpat.py

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# XXX TypeErrors on calling handlers, or on bad return values from a
# handler, are obscure and unhelpful.
import StringIO, sys
import unittest
import pyexpat
from xml.parsers import expat
from test.test_support import sortdict, run_unittest
class SetAttributeTest(unittest.TestCase):
def setUp(self):
self.parser = expat.ParserCreate(namespace_separator='!')
self.set_get_pairs = [
[0, 0],
[1, 1],
[2, 1],
[0, 0],
]
def test_returns_unicode(self):
for x, y in self.set_get_pairs:
self.parser.returns_unicode = x
self.assertEquals(self.parser.returns_unicode, y)
def test_ordered_attributes(self):
for x, y in self.set_get_pairs:
self.parser.ordered_attributes = x
self.assertEquals(self.parser.ordered_attributes, y)
def test_specified_attributes(self):
for x, y in self.set_get_pairs:
self.parser.specified_attributes = x
self.assertEquals(self.parser.specified_attributes, y)
Get rid of the superstitious "~" in dict hashing's "i = (~hash) & mask". The comment following used to say: /* We use ~hash instead of hash, as degenerate hash functions, such as for ints <sigh>, can have lots of leading zeros. It's not really a performance risk, but better safe than sorry. 12-Dec-00 tim: so ~hash produces lots of leading ones instead -- what's the gain? */ That is, there was never a good reason for doing it. And to the contrary, as explained on Python-Dev last December, it tended to make the *sum* (i + incr) & mask (which is the first table index examined in case of collison) the same "too often" across distinct hashes. Changing to the simpler "i = hash & mask" reduced the number of string-dict collisions (== # number of times we go around the lookup for-loop) from about 6 million to 5 million during a full run of the test suite (these are approximate because the test suite does some random stuff from run to run). The number of collisions in non-string dicts also decreased, but not as dramatically. Note that this may, for a given dict, change the order (wrt previous releases) of entries exposed by .keys(), .values() and .items(). A number of std tests suffered bogus failures as a result. For dicts keyed by small ints, or (less so) by characters, the order is much more likely to be in increasing order of key now; e.g., >>> d = {} >>> for i in range(10): ... d[i] = i ... >>> d {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9} >>> Unfortunately. people may latch on to that in small examples and draw a bogus conclusion. test_support.py Moved test_extcall's sortdict() into test_support, made it stronger, and imported sortdict into other std tests that needed it. test_unicode.py Excluced cp875 from the "roundtrip over range(128)" test, because cp875 doesn't have a well-defined inverse for unicode("?", "cp875"). See Python-Dev for excruciating details. Cookie.py Chaged various output functions to sort dicts before building strings from them. test_extcall Fiddled the expected-result file. This remains sensitive to native dict ordering, because, e.g., if there are multiple errors in a keyword-arg dict (and test_extcall sets up many cases like that), the specific error Python complains about first depends on native dict ordering.
2001-05-12 21:19:31 -03:00
data = '''\
<?xml version="1.0" encoding="iso-8859-1" standalone="no"?>
<?xml-stylesheet href="stylesheet.css"?>
<!-- comment data -->
<!DOCTYPE quotations SYSTEM "quotations.dtd" [
<!ELEMENT root ANY>
<!NOTATION notation SYSTEM "notation.jpeg">
<!ENTITY acirc "&#226;">
<!ENTITY external_entity SYSTEM "entity.file">
<!ENTITY unparsed_entity SYSTEM "entity.file" NDATA notation>
%unparsed_entity;
]>
<root attr1="value1" attr2="value2&#8000;">
<myns:subelement xmlns:myns="http://www.python.org/namespace">
Contents of subelements
</myns:subelement>
<sub2><![CDATA[contents of CDATA section]]></sub2>
&external_entity;
</root>
'''
# Produce UTF-8 output
class ParseTest(unittest.TestCase):
class Outputter:
def __init__(self):
self.out = []
def StartElementHandler(self, name, attrs):
self.out.append('Start element: ' + repr(name) + ' ' +
sortdict(attrs))
def EndElementHandler(self, name):
self.out.append('End element: ' + repr(name))
def CharacterDataHandler(self, data):
data = data.strip()
if data:
self.out.append('Character data: ' + repr(data))
def ProcessingInstructionHandler(self, target, data):
self.out.append('PI: ' + repr(target) + ' ' + repr(data))
def StartNamespaceDeclHandler(self, prefix, uri):
self.out.append('NS decl: ' + repr(prefix) + ' ' + repr(uri))
def EndNamespaceDeclHandler(self, prefix):
self.out.append('End of NS decl: ' + repr(prefix))
def StartCdataSectionHandler(self):
self.out.append('Start of CDATA section')
def EndCdataSectionHandler(self):
self.out.append('End of CDATA section')
def CommentHandler(self, text):
self.out.append('Comment: ' + repr(text))
def NotationDeclHandler(self, *args):
name, base, sysid, pubid = args
self.out.append('Notation declared: %s' %(args,))
def UnparsedEntityDeclHandler(self, *args):
entityName, base, systemId, publicId, notationName = args
self.out.append('Unparsed entity decl: %s' %(args,))
def NotStandaloneHandler(self, userData):
self.out.append('Not standalone')
return 1
def ExternalEntityRefHandler(self, *args):
context, base, sysId, pubId = args
self.out.append('External entity ref: %s' %(args[1:],))
return 1
def DefaultHandler(self, userData):
pass
def DefaultHandlerExpand(self, userData):
pass
handler_names = [
'StartElementHandler', 'EndElementHandler',
'CharacterDataHandler', 'ProcessingInstructionHandler',
'UnparsedEntityDeclHandler', 'NotationDeclHandler',
'StartNamespaceDeclHandler', 'EndNamespaceDeclHandler',
'CommentHandler', 'StartCdataSectionHandler',
'EndCdataSectionHandler',
'DefaultHandler', 'DefaultHandlerExpand',
#'NotStandaloneHandler',
'ExternalEntityRefHandler'
]
def test_utf8(self):
out = self.Outputter()
parser = expat.ParserCreate(namespace_separator='!')
for name in self.handler_names:
setattr(parser, name, getattr(out, name))
parser.returns_unicode = 0
parser.Parse(data, 1)
# Verify output
op = out.out
self.assertEquals(op[0], 'PI: \'xml-stylesheet\' \'href="stylesheet.css"\'')
self.assertEquals(op[1], "Comment: ' comment data '")
self.assertEquals(op[2], "Notation declared: ('notation', None, 'notation.jpeg', None)")
self.assertEquals(op[3], "Unparsed entity decl: ('unparsed_entity', None, 'entity.file', None, 'notation')")
self.assertEquals(op[4], "Start element: 'root' {'attr1': 'value1', 'attr2': 'value2\\xe1\\xbd\\x80'}")
self.assertEquals(op[5], "NS decl: 'myns' 'http://www.python.org/namespace'")
self.assertEquals(op[6], "Start element: 'http://www.python.org/namespace!subelement' {}")
self.assertEquals(op[7], "Character data: 'Contents of subelements'")
self.assertEquals(op[8], "End element: 'http://www.python.org/namespace!subelement'")
self.assertEquals(op[9], "End of NS decl: 'myns'")
self.assertEquals(op[10], "Start element: 'sub2' {}")
self.assertEquals(op[11], 'Start of CDATA section')
self.assertEquals(op[12], "Character data: 'contents of CDATA section'")
self.assertEquals(op[13], 'End of CDATA section')
self.assertEquals(op[14], "End element: 'sub2'")
self.assertEquals(op[15], "External entity ref: (None, 'entity.file', None)")
self.assertEquals(op[16], "End element: 'root'")
def test_unicode(self):
# Try the parse again, this time producing Unicode output
out = self.Outputter()
parser = expat.ParserCreate(namespace_separator='!')
parser.returns_unicode = 1
for name in self.handler_names:
setattr(parser, name, getattr(out, name))
parser.Parse(data, 1)
op = out.out
self.assertEquals(op[0], 'PI: u\'xml-stylesheet\' u\'href="stylesheet.css"\'')
self.assertEquals(op[1], "Comment: u' comment data '")
self.assertEquals(op[2], "Notation declared: (u'notation', None, u'notation.jpeg', None)")
self.assertEquals(op[3], "Unparsed entity decl: (u'unparsed_entity', None, u'entity.file', None, u'notation')")
self.assertEquals(op[4], "Start element: u'root' {u'attr1': u'value1', u'attr2': u'value2\\u1f40'}")
self.assertEquals(op[5], "NS decl: u'myns' u'http://www.python.org/namespace'")
self.assertEquals(op[6], "Start element: u'http://www.python.org/namespace!subelement' {}")
self.assertEquals(op[7], "Character data: u'Contents of subelements'")
self.assertEquals(op[8], "End element: u'http://www.python.org/namespace!subelement'")
self.assertEquals(op[9], "End of NS decl: u'myns'")
self.assertEquals(op[10], "Start element: u'sub2' {}")
self.assertEquals(op[11], 'Start of CDATA section')
self.assertEquals(op[12], "Character data: u'contents of CDATA section'")
self.assertEquals(op[13], 'End of CDATA section')
self.assertEquals(op[14], "End element: u'sub2'")
self.assertEquals(op[15], "External entity ref: (None, u'entity.file', None)")
self.assertEquals(op[16], "End element: u'root'")
def test_parse_file(self):
# Try parsing a file
out = self.Outputter()
parser = expat.ParserCreate(namespace_separator='!')
parser.returns_unicode = 1
for name in self.handler_names:
setattr(parser, name, getattr(out, name))
file = StringIO.StringIO(data)
parser.ParseFile(file)
op = out.out
self.assertEquals(op[0], 'PI: u\'xml-stylesheet\' u\'href="stylesheet.css"\'')
self.assertEquals(op[1], "Comment: u' comment data '")
self.assertEquals(op[2], "Notation declared: (u'notation', None, u'notation.jpeg', None)")
self.assertEquals(op[3], "Unparsed entity decl: (u'unparsed_entity', None, u'entity.file', None, u'notation')")
self.assertEquals(op[4], "Start element: u'root' {u'attr1': u'value1', u'attr2': u'value2\\u1f40'}")
self.assertEquals(op[5], "NS decl: u'myns' u'http://www.python.org/namespace'")
self.assertEquals(op[6], "Start element: u'http://www.python.org/namespace!subelement' {}")
self.assertEquals(op[7], "Character data: u'Contents of subelements'")
self.assertEquals(op[8], "End element: u'http://www.python.org/namespace!subelement'")
self.assertEquals(op[9], "End of NS decl: u'myns'")
self.assertEquals(op[10], "Start element: u'sub2' {}")
self.assertEquals(op[11], 'Start of CDATA section')
self.assertEquals(op[12], "Character data: u'contents of CDATA section'")
self.assertEquals(op[13], 'End of CDATA section')
self.assertEquals(op[14], "End element: u'sub2'")
self.assertEquals(op[15], "External entity ref: (None, u'entity.file', None)")
self.assertEquals(op[16], "End element: u'root'")
class NamespaceSeparatorTest(unittest.TestCase):
def test_legal(self):
# Tests that make sure we get errors when the namespace_separator value
# is illegal, and that we don't for good values:
expat.ParserCreate()
expat.ParserCreate(namespace_separator=None)
expat.ParserCreate(namespace_separator=' ')
def test_illegal(self):
try:
expat.ParserCreate(namespace_separator=42)
self.fail()
except TypeError, e:
self.assertEquals(str(e),
'ParserCreate() argument 2 must be string or None, not int')
try:
expat.ParserCreate(namespace_separator='too long')
self.fail()
except ValueError, e:
self.assertEquals(str(e),
'namespace_separator must be at most one character, omitted, or None')
def test_zero_length(self):
# ParserCreate() needs to accept a namespace_separator of zero length
# to satisfy the requirements of RDF applications that are required
# to simply glue together the namespace URI and the localname. Though
# considered a wart of the RDF specifications, it needs to be supported.
#
# See XML-SIG mailing list thread starting with
# http://mail.python.org/pipermail/xml-sig/2001-April/005202.html
#
expat.ParserCreate(namespace_separator='') # too short
class InterningTest(unittest.TestCase):
def test(self):
# Test the interning machinery.
p = expat.ParserCreate()
L = []
def collector(name, *args):
L.append(name)
p.StartElementHandler = collector
p.EndElementHandler = collector
p.Parse("<e> <e/> <e></e> </e>", 1)
tag = L[0]
self.assertEquals(len(L), 6)
for entry in L:
# L should have the same string repeated over and over.
self.assertTrue(tag is entry)
class BufferTextTest(unittest.TestCase):
def setUp(self):
self.stuff = []
self.parser = expat.ParserCreate()
self.parser.buffer_text = 1
self.parser.CharacterDataHandler = self.CharacterDataHandler
def check(self, expected, label):
self.assertEquals(self.stuff, expected,
"%s\nstuff = %r\nexpected = %r"
% (label, self.stuff, map(unicode, expected)))
def CharacterDataHandler(self, text):
self.stuff.append(text)
def StartElementHandler(self, name, attrs):
self.stuff.append("<%s>" % name)
bt = attrs.get("buffer-text")
if bt == "yes":
self.parser.buffer_text = 1
elif bt == "no":
self.parser.buffer_text = 0
def EndElementHandler(self, name):
self.stuff.append("</%s>" % name)
def CommentHandler(self, data):
self.stuff.append("<!--%s-->" % data)
def setHandlers(self, handlers=[]):
for name in handlers:
setattr(self.parser, name, getattr(self, name))
def test_default_to_disabled(self):
parser = expat.ParserCreate()
self.assertFalse(parser.buffer_text)
def test_buffering_enabled(self):
# Make sure buffering is turned on
self.assertTrue(self.parser.buffer_text)
self.parser.Parse("<a>1<b/>2<c/>3</a>", 1)
self.assertEquals(self.stuff, ['123'],
"buffered text not properly collapsed")
def test1(self):
# XXX This test exposes more detail of Expat's text chunking than we
# XXX like, but it tests what we need to concisely.
self.setHandlers(["StartElementHandler"])
self.parser.Parse("<a>1<b buffer-text='no'/>2\n3<c buffer-text='yes'/>4\n5</a>", 1)
self.assertEquals(self.stuff,
["<a>", "1", "<b>", "2", "\n", "3", "<c>", "4\n5"],
"buffering control not reacting as expected")
def test2(self):
self.parser.Parse("<a>1<b/>&lt;2&gt;<c/>&#32;\n&#x20;3</a>", 1)
self.assertEquals(self.stuff, ["1<2> \n 3"],
"buffered text not properly collapsed")
def test3(self):
self.setHandlers(["StartElementHandler"])
self.parser.Parse("<a>1<b/>2<c/>3</a>", 1)
self.assertEquals(self.stuff, ["<a>", "1", "<b>", "2", "<c>", "3"],
"buffered text not properly split")
def test4(self):
self.setHandlers(["StartElementHandler", "EndElementHandler"])
self.parser.CharacterDataHandler = None
self.parser.Parse("<a>1<b/>2<c/>3</a>", 1)
self.assertEquals(self.stuff,
["<a>", "<b>", "</b>", "<c>", "</c>", "</a>"])
def test5(self):
self.setHandlers(["StartElementHandler", "EndElementHandler"])
self.parser.Parse("<a>1<b></b>2<c/>3</a>", 1)
self.assertEquals(self.stuff,
["<a>", "1", "<b>", "</b>", "2", "<c>", "</c>", "3", "</a>"])
def test6(self):
self.setHandlers(["CommentHandler", "EndElementHandler",
"StartElementHandler"])
self.parser.Parse("<a>1<b/>2<c></c>345</a> ", 1)
self.assertEquals(self.stuff,
["<a>", "1", "<b>", "</b>", "2", "<c>", "</c>", "345", "</a>"],
"buffered text not properly split")
def test7(self):
self.setHandlers(["CommentHandler", "EndElementHandler",
"StartElementHandler"])
self.parser.Parse("<a>1<b/>2<c></c>3<!--abc-->4<!--def-->5</a> ", 1)
self.assertEquals(self.stuff,
["<a>", "1", "<b>", "</b>", "2", "<c>", "</c>", "3",
"<!--abc-->", "4", "<!--def-->", "5", "</a>"],
"buffered text not properly split")
# Test handling of exception from callback:
class HandlerExceptionTest(unittest.TestCase):
def StartElementHandler(self, name, attrs):
raise RuntimeError(name)
def test(self):
parser = expat.ParserCreate()
parser.StartElementHandler = self.StartElementHandler
try:
parser.Parse("<a><b><c/></b></a>", 1)
self.fail()
except RuntimeError, e:
self.assertEquals(e.args[0], 'a',
"Expected RuntimeError for element 'a', but" + \
" found %r" % e.args[0])
# Test Current* members:
class PositionTest(unittest.TestCase):
def StartElementHandler(self, name, attrs):
self.check_pos('s')
def EndElementHandler(self, name):
self.check_pos('e')
def check_pos(self, event):
pos = (event,
self.parser.CurrentByteIndex,
self.parser.CurrentLineNumber,
self.parser.CurrentColumnNumber)
self.assertTrue(self.upto < len(self.expected_list),
'too many parser events')
expected = self.expected_list[self.upto]
self.assertEquals(pos, expected,
'Expected position %s, got position %s' %(pos, expected))
self.upto += 1
def test(self):
self.parser = expat.ParserCreate()
self.parser.StartElementHandler = self.StartElementHandler
self.parser.EndElementHandler = self.EndElementHandler
self.upto = 0
self.expected_list = [('s', 0, 1, 0), ('s', 5, 2, 1), ('s', 11, 3, 2),
('e', 15, 3, 6), ('e', 17, 4, 1), ('e', 22, 5, 0)]
xml = '<a>\n <b>\n <c/>\n </b>\n</a>'
self.parser.Parse(xml, 1)
class sf1296433Test(unittest.TestCase):
def test_parse_only_xml_data(self):
# http://python.org/sf/1296433
#
xml = "<?xml version='1.0' encoding='iso8859'?><s>%s</s>" % ('a' * 1025)
# this one doesn't crash
#xml = "<?xml version='1.0'?><s>%s</s>" % ('a' * 10000)
class SpecificException(Exception):
pass
def handler(text):
raise SpecificException
parser = expat.ParserCreate()
parser.CharacterDataHandler = handler
self.assertRaises(Exception, parser.Parse, xml)
class ChardataBufferTest(unittest.TestCase):
"""
test setting of chardata buffer size
"""
def test_1025_bytes(self):
self.assertEquals(self.small_buffer_test(1025), 2)
def test_1000_bytes(self):
self.assertEquals(self.small_buffer_test(1000), 1)
def test_wrong_size(self):
parser = expat.ParserCreate()
parser.buffer_text = 1
def f(size):
parser.buffer_size = size
self.assertRaises(TypeError, f, sys.maxint+1)
self.assertRaises(ValueError, f, -1)
self.assertRaises(ValueError, f, 0)
def test_unchanged_size(self):
xml1 = ("<?xml version='1.0' encoding='iso8859'?><s>%s" % ('a' * 512))
xml2 = 'a'*512 + '</s>'
parser = expat.ParserCreate()
parser.CharacterDataHandler = self.counting_handler
parser.buffer_size = 512
parser.buffer_text = 1
# Feed 512 bytes of character data: the handler should be called
# once.
self.n = 0
parser.Parse(xml1)
self.assertEquals(self.n, 1)
# Reassign to buffer_size, but assign the same size.
parser.buffer_size = parser.buffer_size
self.assertEquals(self.n, 1)
# Try parsing rest of the document
parser.Parse(xml2)
self.assertEquals(self.n, 2)
def test_disabling_buffer(self):
xml1 = "<?xml version='1.0' encoding='iso8859'?><a>%s" % ('a' * 512)
xml2 = ('b' * 1024)
xml3 = "%s</a>" % ('c' * 1024)
parser = expat.ParserCreate()
parser.CharacterDataHandler = self.counting_handler
parser.buffer_text = 1
parser.buffer_size = 1024
self.assertEquals(parser.buffer_size, 1024)
# Parse one chunk of XML
self.n = 0
parser.Parse(xml1, 0)
self.assertEquals(parser.buffer_size, 1024)
self.assertEquals(self.n, 1)
# Turn off buffering and parse the next chunk.
parser.buffer_text = 0
self.assertFalse(parser.buffer_text)
self.assertEquals(parser.buffer_size, 1024)
for i in range(10):
parser.Parse(xml2, 0)
self.assertEquals(self.n, 11)
parser.buffer_text = 1
self.assertTrue(parser.buffer_text)
self.assertEquals(parser.buffer_size, 1024)
parser.Parse(xml3, 1)
self.assertEquals(self.n, 12)
def make_document(self, bytes):
return ("<?xml version='1.0'?><tag>" + bytes * 'a' + '</tag>')
def counting_handler(self, text):
self.n += 1
def small_buffer_test(self, buffer_len):
xml = "<?xml version='1.0' encoding='iso8859'?><s>%s</s>" % ('a' * buffer_len)
parser = expat.ParserCreate()
parser.CharacterDataHandler = self.counting_handler
parser.buffer_size = 1024
parser.buffer_text = 1
self.n = 0
parser.Parse(xml)
return self.n
def test_change_size_1(self):
xml1 = "<?xml version='1.0' encoding='iso8859'?><a><s>%s" % ('a' * 1024)
xml2 = "aaa</s><s>%s</s></a>" % ('a' * 1025)
parser = expat.ParserCreate()
parser.CharacterDataHandler = self.counting_handler
parser.buffer_text = 1
parser.buffer_size = 1024
self.assertEquals(parser.buffer_size, 1024)
self.n = 0
parser.Parse(xml1, 0)
parser.buffer_size *= 2
self.assertEquals(parser.buffer_size, 2048)
parser.Parse(xml2, 1)
self.assertEquals(self.n, 2)
def test_change_size_2(self):
xml1 = "<?xml version='1.0' encoding='iso8859'?><a>a<s>%s" % ('a' * 1023)
xml2 = "aaa</s><s>%s</s></a>" % ('a' * 1025)
parser = expat.ParserCreate()
parser.CharacterDataHandler = self.counting_handler
parser.buffer_text = 1
parser.buffer_size = 2048
self.assertEquals(parser.buffer_size, 2048)
self.n=0
parser.Parse(xml1, 0)
parser.buffer_size /= 2
self.assertEquals(parser.buffer_size, 1024)
parser.Parse(xml2, 1)
self.assertEquals(self.n, 4)
def test_main():
run_unittest(SetAttributeTest,
ParseTest,
NamespaceSeparatorTest,
InterningTest,
BufferTextTest,
HandlerExceptionTest,
PositionTest,
sf1296433Test,
ChardataBufferTest)
if __name__ == "__main__":
test_main()