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test_elementpath.py
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test_elementpath.py
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"""
Tests for the ElementPath implementation.
"""
import sys
import unittest
from copy import deepcopy
from .common_imports import etree, HelperTestCase
def summarize(elem):
return elem.tag
def summarize_list(seq):
return list(map(summarize, seq))
def normalize_crlf(tree):
for elem in tree.getiterator():
if elem.text: elem.text = elem.text.replace("\r\n", "\n")
if elem.tail: elem.tail = elem.tail.replace("\r\n", "\n")
class EtreeElementPathTestCase(HelperTestCase):
etree = etree
from lxml import _elementpath
def test_cache(self):
self._elementpath._cache.clear()
el = self.etree.XML(b'<a><b><c/><c/></b></a>')
self.assertFalse(self._elementpath._cache)
self.assertTrue(el.findall('b/c'))
self.assertEqual(1, len(self._elementpath._cache))
self.assertTrue(el.findall('b/c'))
self.assertEqual(1, len(self._elementpath._cache))
self.assertFalse(el.findall('xxx'))
self.assertEqual(2, len(self._elementpath._cache))
self.assertFalse(el.findall('xxx'))
self.assertEqual(2, len(self._elementpath._cache))
self.assertTrue(el.findall('b/c'))
self.assertEqual(2, len(self._elementpath._cache))
def _assert_tokens(self, tokens, path, namespaces=None):
self.assertEqual(tokens, list(self._elementpath.xpath_tokenizer(path, namespaces)))
def test_tokenizer(self):
assert_tokens = self._assert_tokens
assert_tokens(
[('/', '')],
'/',
)
assert_tokens(
[('.', ''), ('/', ''), ('', 'a'), ('/', ''), ('', 'b'), ('/', ''), ('', 'c')],
'./a/b/c',
)
assert_tokens(
[('/', ''), ('', 'a'), ('/', ''), ('', 'b'), ('/', ''), ('', 'c')],
'/a/b/c',
)
assert_tokens(
[('/', ''), ('', '{nsx}a'), ('/', ''), ('', '{nsy}b'), ('/', ''), ('', 'c')],
'/x:a/y:b/c',
{'x': 'nsx', 'y': 'nsy'},
)
assert_tokens(
[('/', ''), ('', '{nsx}a'), ('/', ''), ('', '{nsy}b'), ('/', ''), ('', '{nsnone}c')],
'/x:a/y:b/c',
{'x': 'nsx', 'y': 'nsy', None: 'nsnone'},
)
def test_tokenizer_predicates(self):
assert_tokens = self._assert_tokens
assert_tokens(
[('', 'a'), ('[', ''), ('', 'b'), (']', '')],
'a[b]',
)
assert_tokens(
[('', 'a'), ('[', ''), ('', 'b'), ('=', ''), ('"abc"', ''), (']', '')],
'a[b="abc"]',
)
assert_tokens(
[('', 'a'), ('[', ''), ('.', ''), ('', ''), ('=', ''), ('', ''), ('"abc"', ''), (']', '')],
'a[. = "abc"]',
)
def test_xpath_tokenizer(self):
# Test the XPath tokenizer. Copied from CPython's "test_xml_etree.py"
ElementPath = self._elementpath
def check(p, expected, namespaces=None):
self.assertEqual([op or tag
for op, tag in ElementPath.xpath_tokenizer(p, namespaces)],
expected)
# tests from the xml specification
check("*", ['*'])
check("text()", ['text', '()'])
check("@name", ['@', 'name'])
check("@*", ['@', '*'])
check("para[1]", ['para', '[', '1', ']'])
check("para[last()]", ['para', '[', 'last', '()', ']'])
check("*/para", ['*', '/', 'para'])
check("/doc/chapter[5]/section[2]",
['/', 'doc', '/', 'chapter', '[', '5', ']',
'/', 'section', '[', '2', ']'])
check("chapter//para", ['chapter', '//', 'para'])
check("//para", ['//', 'para'])
check("//olist/item", ['//', 'olist', '/', 'item'])
check(".", ['.'])
check(".//para", ['.', '//', 'para'])
check("..", ['..'])
check("../@lang", ['..', '/', '@', 'lang'])
check("chapter[title]", ['chapter', '[', 'title', ']'])
check("employee[@secretary and @assistant]", ['employee',
'[', '@', 'secretary', '', 'and', '', '@', 'assistant', ']'])
# additional tests
check("@{ns}attr", ['@', '{ns}attr'])
check("{http://spam}egg", ['{http://spam}egg'])
check("./spam.egg", ['.', '/', 'spam.egg'])
check(".//{http://spam}egg", ['.', '//', '{http://spam}egg'])
# wildcard tags
check("{ns}*", ['{ns}*'])
check("{}*", ['{}*'])
check("{*}tag", ['{*}tag'])
check("{*}*", ['{*}*'])
check(".//{*}tag", ['.', '//', '{*}tag'])
# namespace prefix resolution
check("./xsd:type", ['.', '/', '{http://www.w3.org/2001/XMLSchema}type'],
{'xsd': 'http://www.w3.org/2001/XMLSchema'})
check("type", ['{http://www.w3.org/2001/XMLSchema}type'],
{'': 'http://www.w3.org/2001/XMLSchema'})
check("@xsd:type", ['@', '{http://www.w3.org/2001/XMLSchema}type'],
{'xsd': 'http://www.w3.org/2001/XMLSchema'})
check("@type", ['@', 'type'],
{'': 'http://www.w3.org/2001/XMLSchema'})
check("@{*}type", ['@', '{*}type'],
{'': 'http://www.w3.org/2001/XMLSchema'})
check("@{ns}attr", ['@', '{ns}attr'],
{'': 'http://www.w3.org/2001/XMLSchema',
'ns': 'http://www.w3.org/2001/XMLSchema'})
def test_find(self):
"""
Test find methods (including xpath syntax).
Originally copied from 'selftest.py'.
"""
elem = etree.XML("""
<body>
<tag class='a'>text</tag>
<tag class='b' />
<section>
<tag class='b' id='inner'>subtext</tag>
</section>
</body>
""")
self.assertEqual(elem.find("tag").tag,
'tag')
self.assertEqual(etree.ElementTree(elem).find("tag").tag,
'tag')
self.assertEqual(elem.find("section/tag").tag,
'tag')
self.assertEqual(etree.ElementTree(elem).find("section/tag").tag,
'tag')
self.assertEqual(elem.findtext("tag"),
'text')
self.assertEqual(elem.findtext("tog"),
None)
self.assertEqual(elem.findtext("tog", "default"),
'default')
self.assertEqual(etree.ElementTree(elem).findtext("tag"),
'text')
self.assertEqual(elem.findtext("section/tag"),
'subtext')
self.assertEqual(etree.ElementTree(elem).findtext("section/tag"),
'subtext')
self.assertEqual(summarize_list(elem.findall("tag")),
['tag', 'tag'])
self.assertEqual(summarize_list(elem.findall("*")),
['tag', 'tag', 'section'])
self.assertEqual(summarize_list(elem.findall(".//tag")),
['tag', 'tag', 'tag'])
self.assertEqual(summarize_list(elem.findall("section/tag")),
['tag'])
self.assertEqual(summarize_list(elem.findall("section//tag")),
['tag'])
self.assertEqual(summarize_list(elem.findall("section/*")),
['tag'])
self.assertEqual(summarize_list(elem.findall("section//*")),
['tag'])
self.assertEqual(summarize_list(elem.findall("section/.//*")),
['tag'])
self.assertEqual(summarize_list(elem.findall("*/*")),
['tag'])
self.assertEqual(summarize_list(elem.findall("*//*")),
['tag'])
self.assertEqual(summarize_list(elem.findall("*/tag")),
['tag'])
self.assertEqual(summarize_list(elem.findall("*/./tag")),
['tag'])
self.assertEqual(summarize_list(elem.findall("./tag")),
['tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag")),
['tag', 'tag', 'tag'])
self.assertEqual(summarize_list(elem.findall("././tag")),
['tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[@class]")),
['tag', 'tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[ @class]")),
['tag', 'tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[@class ]")),
['tag', 'tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[ @class ]")),
['tag', 'tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[@class='a']")),
['tag'])
self.assertEqual(summarize_list(elem.findall('.//tag[@class="a"]')),
['tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[@class='b']")),
['tag', 'tag'])
self.assertEqual(summarize_list(elem.findall('.//tag[@class="b"]')),
['tag', 'tag'])
self.assertEqual(summarize_list(elem.findall('.//tag[@class = "b"]')),
['tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[@id]")),
['tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[@class][@id]")),
['tag'])
self.assertEqual(summarize_list(elem.findall(".//section[tag]")),
['section'])
self.assertEqual(summarize_list(elem.findall(".//section[element]")),
[])
self.assertEqual(summarize_list(elem.findall(".//section[tag='subtext']")),
['section'])
self.assertEqual(summarize_list(elem.findall(".//section[tag ='subtext']")),
['section'])
self.assertEqual(summarize_list(elem.findall(".//section[tag= 'subtext']")),
['section'])
self.assertEqual(summarize_list(elem.findall(".//section[tag = 'subtext']")),
['section'])
self.assertEqual(summarize_list(elem.findall(".//section[ tag = 'subtext' ]")),
['section'])
self.assertEqual(summarize_list(elem.findall(".//tag[.='subtext']")),
['tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[. ='subtext']")),
['tag'])
self.assertEqual(summarize_list(elem.findall('.//tag[.= "subtext"]')),
['tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[. = 'subtext']")),
['tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[. = 'subtext ']")),
[])
self.assertEqual(summarize_list(elem.findall(".//tag[.= ' subtext']")),
[])
self.assertEqual(summarize_list(elem.findall("../tag")),
[])
self.assertEqual(summarize_list(elem.findall("section/../tag")),
['tag', 'tag'])
self.assertEqual(summarize_list(etree.ElementTree(elem).findall("./tag")),
['tag', 'tag'])
self.assertEqual(summarize_list(etree.ElementTree(elem).findall("/tag")),
['tag', 'tag'])
# This would be correct:
if False:
self.assertEqual(summarize_list(etree.ElementTree(elem).findall("/body")),
['body'])
# duplicate section => 2x tag matches
elem[1] = deepcopy(elem[2])
self.assertEqual(summarize_list(elem.findall(".//section[tag = 'subtext']")),
['section', 'section'])
self.assertEqual(summarize_list(elem.findall(".//tag[. = 'subtext']")),
['tag', 'tag'])
self.assertEqual(summarize_list(elem.findall(".//tag[@class][@id]")),
['tag', 'tag'])
def test_find_warning(self):
etree = self.etree
elem = etree.XML("""
<body>
<tag class='a'>text</tag>
<tag class='b' />
<section>
<tag class='b' id='inner'>subtext</tag>
</section>
</body>
""")
# FIXME: ET's Path module handles this case incorrectly; this gives
# a warning in 1.3, and the behaviour will be modified in the future.
self.assertWarnsRegex(
FutureWarning, ".*If you rely on the current behaviour, change it to './tag'",
etree.ElementTree(elem).findall, "/tag")
self.assertWarnsRegex(
FutureWarning, ".*If you rely on the current behaviour, change it to './tag'",
etree.ElementTree(elem).findtext, "/tag")
self.assertWarnsRegex(
FutureWarning, ".*If you rely on the current behaviour, change it to './tag'",
etree.ElementTree(elem).find, "/tag")
self.assertWarnsRegex(
FutureWarning, ".*If you rely on the current behaviour, change it to './tag'",
etree.ElementTree(elem).iterfind, "/tag")
class ElementTreeElementPathTestCase(EtreeElementPathTestCase):
import xml.etree.ElementTree as etree
import xml.etree.ElementPath as _elementpath
test_cache = unittest.skip("lxml-only")(EtreeElementPathTestCase.test_cache)
test_tokenizer = unittest.skip("lxml-only")(EtreeElementPathTestCase.test_tokenizer)
if sys.version_info < (3, 8):
test_xpath_tokenizer = unittest.skip("lxml-only")(EtreeElementPathTestCase.test_xpath_tokenizer)
def test_suite():
suite = unittest.TestSuite()
suite.addTests([unittest.defaultTestLoader.loadTestsFromTestCase(EtreeElementPathTestCase)])
suite.addTests([unittest.defaultTestLoader.loadTestsFromTestCase(ElementTreeElementPathTestCase)])
return suite
if __name__ == '__main__':
print('to test use test.py %s' % __file__)