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import re
import unittest
import weakref
import libxml2
from scrapy.http import TextResponse, HtmlResponse, XmlResponse
from scrapy.selector import XmlXPathSelector, HtmlXPathSelector, \
XPathSelector
from scrapy.selector.document import Libxml2Document
from scrapy.utils.test import libxml2debug
class XPathSelectorTestCase(unittest.TestCase):
@libxml2debug
def test_selector_simple(self):
"""Simple selector tests"""
body = "<p><input name='a'value='1'/><input name='b'value='2'/></p>"
response = TextResponse(url="http://example.com", body=body)
xpath = HtmlXPathSelector(response)
xl = xpath.select('//input')
self.assertEqual(2, len(xl))
for x in xl:
assert isinstance(x, HtmlXPathSelector)
self.assertEqual(xpath.select('//input').extract(),
[x.extract() for x in xpath.select('//input')])
self.assertEqual([x.extract() for x in xpath.select("//input[@name='a']/@name")],
[u'a'])
self.assertEqual([x.extract() for x in xpath.select("number(concat(//input[@name='a']/@value, //input[@name='b']/@value))")],
[u'12.0'])
self.assertEqual(xpath.select("concat('xpath', 'rules')").extract(),
[u'xpathrules'])
self.assertEqual([x.extract() for x in xpath.select("concat(//input[@name='a']/@value, //input[@name='b']/@value)")],
[u'12'])
@libxml2debug
def test_selector_same_type(self):
"""Test XPathSelector returning the same type in x() method"""
text = '<p>test<p>'
assert isinstance(XmlXPathSelector(text=text).select("//p")[0],
XmlXPathSelector)
assert isinstance(HtmlXPathSelector(text=text).select("//p")[0],
HtmlXPathSelector)
@libxml2debug
def test_selector_xml_html(self):
"""Test that XML and HTML XPathSelector's behave differently"""
# some text which is parsed differently by XML and HTML flavors
text = '<div><img src="a.jpg"><p>Hello</div>'
self.assertEqual(XmlXPathSelector(text=text).select("//div").extract(),
[u'<div><img src="a.jpg"><p>Hello</p></img></div>'])
self.assertEqual(HtmlXPathSelector(text=text).select("//div").extract(),
[u'<div><img src="a.jpg"><p>Hello</p></div>'])
@libxml2debug
def test_selector_nested(self):
"""Nested selector tests"""
body = """<body>
<div class='one'>
<ul>
<li>one</li><li>two</li>
</ul>
</div>
<div class='two'>
<ul>
<li>four</li><li>five</li><li>six</li>
</ul>
</div>
</body>"""
response = HtmlResponse(url="http://example.com", body=body)
x = HtmlXPathSelector(response)
divtwo = x.select('//div[@class="two"]')
self.assertEqual(divtwo.select("//li").extract(),
["<li>one</li>", "<li>two</li>", "<li>four</li>", "<li>five</li>", "<li>six</li>"])
self.assertEqual(divtwo.select("./ul/li").extract(),
["<li>four</li>", "<li>five</li>", "<li>six</li>"])
self.assertEqual(divtwo.select(".//li").extract(),
["<li>four</li>", "<li>five</li>", "<li>six</li>"])
self.assertEqual(divtwo.select("./li").extract(),
[])
@libxml2debug
def test_selector_re(self):
body = """<div>Name: Mary
<ul>
<li>Name: John</li>
<li>Age: 10</li>
<li>Name: Paul</li>
<li>Age: 20</li>
</ul>
Age: 20
</div>
"""
response = HtmlResponse(url="http://example.com", body=body)
x = HtmlXPathSelector(response)
name_re = re.compile("Name: (\w+)")
self.assertEqual(x.select("//ul/li").re(name_re),
["John", "Paul"])
self.assertEqual(x.select("//ul/li").re("Age: (\d+)"),
["10", "20"])
@libxml2debug
def test_selector_over_text(self):
hxs = HtmlXPathSelector(text='<root>lala</root>')
self.assertEqual(hxs.extract(),
u'<html><body><root>lala</root></body></html>')
xxs = XmlXPathSelector(text='<root>lala</root>')
self.assertEqual(xxs.extract(),
u'<root>lala</root>')
xxs = XmlXPathSelector(text='<root>lala</root>')
self.assertEqual(xxs.select('.').extract(),
[u'<root>lala</root>'])
@libxml2debug
def test_selector_namespaces_simple(self):
body = """
<test xmlns:somens="http://scrapy.org">
<somens:a id="foo"/>
<a id="bar">found</a>
</test>
"""
response = XmlResponse(url="http://example.com", body=body)
x = XmlXPathSelector(response)
x.register_namespace("somens", "http://scrapy.org")
self.assertEqual(x.select("//somens:a").extract(),
['<somens:a id="foo"/>'])
@libxml2debug
def test_selector_namespaces_multiple(self):
body = """<?xml version="1.0" encoding="UTF-8"?>
<BrowseNode xmlns="http://webservices.amazon.com/AWSECommerceService/2005-10-05"
xmlns:b="http://somens.com"
xmlns:p="http://www.scrapy.org/product" >
<b:Operation>hello</b:Operation>
<TestTag b:att="value"><Other>value</Other></TestTag>
<p:SecondTestTag><material/><price>90</price><p:name>Dried Rose</p:name></p:SecondTestTag>
</BrowseNode>
"""
response = XmlResponse(url="http://example.com", body=body)
x = XmlXPathSelector(response)
x.register_namespace("xmlns", "http://webservices.amazon.com/AWSECommerceService/2005-10-05")
x.register_namespace("p", "http://www.scrapy.org/product")
x.register_namespace("b", "http://somens.com")
self.assertEqual(len(x.select("//xmlns:TestTag")), 1)
self.assertEqual(x.select("//b:Operation/text()").extract()[0], 'hello')
self.assertEqual(x.select("//xmlns:TestTag/@b:att").extract()[0], 'value')
self.assertEqual(x.select("//p:SecondTestTag/xmlns:price/text()").extract()[0], '90')
self.assertEqual(x.select("//p:SecondTestTag").select("./xmlns:price/text()")[0].extract(), '90')
self.assertEqual(x.select("//p:SecondTestTag/xmlns:material").extract()[0], '<material/>')
@libxml2debug
def test_selector_invalid_xpath(self):
response = XmlResponse(url="http://example.com", body="<html></html>")
x = HtmlXPathSelector(response)
xpath = "//test[@foo='bar]"
try:
x.select(xpath)
except ValueError, e:
assert xpath in str(e), "Exception message does not contain invalid xpath"
except Exception:
raise AssertionError("A invalid XPath does not raise ValueError")
else:
raise AssertionError("A invalid XPath does not raise an exception")
@libxml2debug
def test_http_header_encoding_precedence(self):
# u'\xa3' = pound symbol in unicode
# u'\xc2\xa3' = pound symbol in utf-8
# u'\xa3' = pound symbol in latin-1 (iso-8859-1)
meta = u'<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">'
head = u'<head>' + meta + u'</head>'
body_content = u'<span id="blank">\xa3</span>'
body = u'<body>' + body_content + u'</body>'
html = u'<html>' + head + body + u'</html>'
encoding = 'utf-8'
html_utf8 = html.encode(encoding)
headers = {'Content-Type': ['text/html; charset=utf-8']}
response = HtmlResponse(url="http://example.com", headers=headers, body=html_utf8)
x = HtmlXPathSelector(response)
self.assertEquals(x.select("//span[@id='blank']/text()").extract(),
[u'\xa3'])
@libxml2debug
def test_null_bytes(self):
hxs = HtmlXPathSelector(text='<root>la\x00la</root>')
self.assertEqual(hxs.extract(),
u'<html><body><root>lala</root></body></html>')
xxs = XmlXPathSelector(text='<root>la\x00la</root>')
self.assertEqual(xxs.extract(),
u'<root>lala</root>')
@libxml2debug
def test_unquote(self):
xmldoc = '\n'.join((
'<root>',
' lala',
' <node>',
' blabla&more<!--comment-->a<b>test</b>oh',
' <![CDATA[lalalal&ppppp<b>PPPP</b>ppp&la]]>',
' </node>',
' pff',
'</root>'))
xxs = XmlXPathSelector(text=xmldoc)
self.assertEqual(xxs.extract_unquoted(), u'')
self.assertEqual(xxs.select('/root').extract_unquoted(), [u''])
self.assertEqual(xxs.select('/root/text()').extract_unquoted(), [
u'\n lala\n ',
u'\n pff\n'])
self.assertEqual(xxs.select('//*').extract_unquoted(), [u'', u'', u''])
self.assertEqual(xxs.select('//text()').extract_unquoted(), [
u'\n lala\n ',
u'\n blabla&more',
u'a',
u'test',
u'oh\n ',
u'lalalal&ppppp<b>PPPP</b>ppp&la',
u'\n ',
u'\n pff\n'])
@libxml2debug
def test_empty_bodies(self):
r1 = TextResponse('http://www.example.com', body='')
hxs = HtmlXPathSelector(r1) # shouldn't raise error
xxs = XmlXPathSelector(r1) # shouldn't raise error
@libxml2debug
def test_weakref_slots(self):
"""Check that classes are using slots and are weak-referenceable"""
for cls in [XPathSelector, HtmlXPathSelector, XmlXPathSelector]:
x = cls()
weakref.ref(x)
assert not hasattr(x, '__dict__'), "%s does not use __slots__" % \
x.__class__.__name__
class Libxml2DocumentTest(unittest.TestCase):
@libxml2debug
def test_response_libxml2_caching(self):
r1 = HtmlResponse('http://www.example.com', body='<html><head></head><body></body></html>')
r2 = r1.copy()
doc1 = Libxml2Document(r1)
doc2 = Libxml2Document(r1)
doc3 = Libxml2Document(r2)
# make sure it's cached
assert doc1 is doc2
assert doc1.xmlDoc is doc2.xmlDoc
assert doc1 is not doc3
assert doc1.xmlDoc is not doc3.xmlDoc
# don't leave libxml2 documents in memory to avoid wrong libxml2 leaks reports
del doc1, doc2, doc3
@libxml2debug
def test_null_char(self):
# make sure bodies with null char ('\x00') don't raise a TypeError exception
self.body_content = 'test problematic \x00 body'
response = TextResponse('http://example.com/catalog/product/blabla-123',
headers={'Content-Type': 'text/plain; charset=utf-8'}, body=self.body_content)
Libxml2Document(response)
class Libxml2Test(unittest.TestCase):
@libxml2debug
def test_libxml2_bug_2_6_27(self):
# this test will fail in version 2.6.27 but passes on 2.6.29+
html = "<td>1<b>2</b>3</td>"
node = libxml2.htmlParseDoc(html, 'utf-8')
result = [str(r) for r in node.xpathEval('//text()')]
self.assertEquals(result, ['1', '2', '3'])
node.freeDoc()
if __name__ == "__main__":
unittest.main()
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