mirror of https://gitlab.com/octtspacc/staticoso
200 lines
7.2 KiB
Python
200 lines
7.2 KiB
Python
"""Tests to ensure that the lxml tree builder generates good trees."""
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import pickle
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import re
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import warnings
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try:
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import lxml.etree
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LXML_PRESENT = True
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LXML_VERSION = lxml.etree.LXML_VERSION
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except ImportError as e:
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LXML_PRESENT = False
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LXML_VERSION = (0,)
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if LXML_PRESENT:
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from bs4.builder import LXMLTreeBuilder, LXMLTreeBuilderForXML
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from bs4 import (
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BeautifulSoup,
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BeautifulStoneSoup,
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)
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from bs4.element import Comment, Doctype, SoupStrainer
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from . import (
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HTMLTreeBuilderSmokeTest,
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XMLTreeBuilderSmokeTest,
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SoupTest,
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skipIf,
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)
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@skipIf(
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not LXML_PRESENT,
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"lxml seems not to be present, not testing its tree builder.")
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class TestLXMLTreeBuilder(SoupTest, HTMLTreeBuilderSmokeTest):
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"""See ``HTMLTreeBuilderSmokeTest``."""
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@property
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def default_builder(self):
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return LXMLTreeBuilder
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def test_out_of_range_entity(self):
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self.assert_soup(
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"<p>foo�bar</p>", "<p>foobar</p>")
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self.assert_soup(
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"<p>foo�bar</p>", "<p>foobar</p>")
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self.assert_soup(
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"<p>foo�bar</p>", "<p>foobar</p>")
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def test_entities_in_foreign_document_encoding(self):
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# We can't implement this case correctly because by the time we
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# hear about markup like "“", it's been (incorrectly) converted into
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# a string like u'\x93'
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pass
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# In lxml < 2.3.5, an empty doctype causes a segfault. Skip this
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# test if an old version of lxml is installed.
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@skipIf(
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not LXML_PRESENT or LXML_VERSION < (2,3,5,0),
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"Skipping doctype test for old version of lxml to avoid segfault.")
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def test_empty_doctype(self):
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soup = self.soup("<!DOCTYPE>")
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doctype = soup.contents[0]
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assert "" == doctype.strip()
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def test_beautifulstonesoup_is_xml_parser(self):
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# Make sure that the deprecated BSS class uses an xml builder
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# if one is installed.
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with warnings.catch_warnings(record=True) as w:
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soup = BeautifulStoneSoup("<b />")
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assert "<b/>" == str(soup.b)
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assert "BeautifulStoneSoup class is deprecated" in str(w[0].message)
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def test_tracking_line_numbers(self):
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# The lxml TreeBuilder cannot keep track of line numbers from
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# the original markup. Even if you ask for line numbers, we
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# don't have 'em.
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#
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# This means that if you have a tag like <sourceline> or
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# <sourcepos>, attribute access will find it rather than
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# giving you a numeric answer.
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soup = self.soup(
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"\n <p>\n\n<sourceline>\n<b>text</b></sourceline><sourcepos></p>",
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store_line_numbers=True
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)
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assert "sourceline" == soup.p.sourceline.name
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assert "sourcepos" == soup.p.sourcepos.name
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@skipIf(
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not LXML_PRESENT,
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"lxml seems not to be present, not testing its XML tree builder.")
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class TestLXMLXMLTreeBuilder(SoupTest, XMLTreeBuilderSmokeTest):
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"""See ``HTMLTreeBuilderSmokeTest``."""
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@property
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def default_builder(self):
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return LXMLTreeBuilderForXML
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def test_namespace_indexing(self):
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soup = self.soup(
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'<?xml version="1.1"?>\n'
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'<root>'
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'<tag xmlns="http://unprefixed-namespace.com">content</tag>'
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'<prefix:tag2 xmlns:prefix="http://prefixed-namespace.com">content</prefix:tag2>'
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'<prefix2:tag3 xmlns:prefix2="http://another-namespace.com">'
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'<subtag xmlns="http://another-unprefixed-namespace.com">'
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'<subsubtag xmlns="http://yet-another-unprefixed-namespace.com">'
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'</prefix2:tag3>'
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'</root>'
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)
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# The BeautifulSoup object includes every namespace prefix
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# defined in the entire document. This is the default set of
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# namespaces used by soupsieve.
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#
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# Un-prefixed namespaces are not included, and if a given
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# prefix is defined twice, only the first prefix encountered
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# in the document shows up here.
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assert soup._namespaces == {
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'xml': 'http://www.w3.org/XML/1998/namespace',
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'prefix': 'http://prefixed-namespace.com',
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'prefix2': 'http://another-namespace.com'
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}
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# A Tag object includes only the namespace prefixes
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# that were in scope when it was parsed.
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# We do not track un-prefixed namespaces as we can only hold
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# one (the first one), and it will be recognized as the
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# default namespace by soupsieve, even when operating from a
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# tag with a different un-prefixed namespace.
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assert soup.tag._namespaces == {
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'xml': 'http://www.w3.org/XML/1998/namespace',
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}
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assert soup.tag2._namespaces == {
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'prefix': 'http://prefixed-namespace.com',
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'xml': 'http://www.w3.org/XML/1998/namespace',
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}
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assert soup.subtag._namespaces == {
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'prefix2': 'http://another-namespace.com',
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'xml': 'http://www.w3.org/XML/1998/namespace',
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}
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assert soup.subsubtag._namespaces == {
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'prefix2': 'http://another-namespace.com',
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'xml': 'http://www.w3.org/XML/1998/namespace',
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}
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def test_namespace_interaction_with_select_and_find(self):
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# Demonstrate how namespaces interact with select* and
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# find* methods.
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soup = self.soup(
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'<?xml version="1.1"?>\n'
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'<root>'
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'<tag xmlns="http://unprefixed-namespace.com">content</tag>'
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'<prefix:tag2 xmlns:prefix="http://prefixed-namespace.com">content</tag>'
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'<subtag xmlns:prefix="http://another-namespace-same-prefix.com">'
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'<prefix:tag3>'
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'</subtag>'
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'</root>'
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)
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# soupselect uses namespace URIs.
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assert soup.select_one('tag').name == 'tag'
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assert soup.select_one('prefix|tag2').name == 'tag2'
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# If a prefix is declared more than once, only the first usage
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# is registered with the BeautifulSoup object.
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assert soup.select_one('prefix|tag3') is None
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# But you can always explicitly specify a namespace dictionary.
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assert soup.select_one(
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'prefix|tag3', namespaces=soup.subtag._namespaces
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).name == 'tag3'
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# And a Tag (as opposed to the BeautifulSoup object) will
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# have a set of default namespaces scoped to that Tag.
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assert soup.subtag.select_one('prefix|tag3').name=='tag3'
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# the find() methods aren't fully namespace-aware; they just
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# look at prefixes.
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assert soup.find('tag').name == 'tag'
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assert soup.find('prefix:tag2').name == 'tag2'
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assert soup.find('prefix:tag3').name == 'tag3'
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assert soup.subtag.find('prefix:tag3').name == 'tag3'
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def test_pickle_removes_builder(self):
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# The lxml TreeBuilder is not picklable, so it won't be
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# preserved in a pickle/unpickle operation.
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soup = self.soup("<a>some markup</a>")
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assert isinstance(soup.builder, self.default_builder)
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pickled = pickle.dumps(soup)
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unpickled = pickle.loads(pickled)
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assert "some markup" == unpickled.a.string
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assert unpickled.builder is None
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