JezK
Edit File: test_htmlparser.py
"""Tests to ensure that the html.parser tree builder generates good trees.""" from pdb import set_trace import pickle import warnings from bs4.builder import ( HTMLParserTreeBuilder, XMLParsedAsHTMLWarning, ) from bs4.builder._htmlparser import BeautifulSoupHTMLParser from . import SoupTest, HTMLTreeBuilderSmokeTest class TestHTMLParserTreeBuilder(SoupTest, HTMLTreeBuilderSmokeTest): default_builder = HTMLParserTreeBuilder def test_namespaced_system_doctype(self): # html.parser can't handle namespaced doctypes, so skip this one. pass def test_namespaced_public_doctype(self): # html.parser can't handle namespaced doctypes, so skip this one. pass def test_builder_is_pickled(self): """Unlike most tree builders, HTMLParserTreeBuilder and will be restored after pickling. """ tree = self.soup("<a><b>foo</a>") dumped = pickle.dumps(tree, 2) loaded = pickle.loads(dumped) assert isinstance(loaded.builder, type(tree.builder)) def test_redundant_empty_element_closing_tags(self): self.assert_soup('<br></br><br></br><br></br>', "<br/><br/><br/>") self.assert_soup('</br></br></br>', "") def test_empty_element(self): # This verifies that any buffered data present when the parser # finishes working is handled. self.assert_soup("foo &# bar", "foo &# bar") def test_tracking_line_numbers(self): # The html.parser TreeBuilder keeps track of line number and # position of each element. markup = "\n <p>\n\n<sourceline>\n<b>text</b></sourceline><sourcepos></p>" soup = self.soup(markup) assert 2 == soup.p.sourceline assert 3 == soup.p.sourcepos assert "sourceline" == soup.p.find('sourceline').name # You can deactivate this behavior. soup = self.soup(markup, store_line_numbers=False) assert "sourceline" == soup.p.sourceline.name assert "sourcepos" == soup.p.sourcepos.name def test_on_duplicate_attribute(self): # The html.parser tree builder has a variety of ways of # handling a tag that contains the same attribute multiple times. markup = '<a class="cls" href="url1" href="url2" href="url3" id="id">' # If you don't provide any particular value for # on_duplicate_attribute, later values replace earlier values. soup = self.soup(markup) assert "url3" == soup.a['href'] assert ["cls"] == soup.a['class'] assert "id" == soup.a['id'] # You can also get this behavior explicitly. def assert_attribute(on_duplicate_attribute, expected): soup = self.soup( markup, on_duplicate_attribute=on_duplicate_attribute ) assert expected == soup.a['href'] # Verify that non-duplicate attributes are treated normally. assert ["cls"] == soup.a['class'] assert "id" == soup.a['id'] assert_attribute(None, "url3") assert_attribute(BeautifulSoupHTMLParser.REPLACE, "url3") # You can ignore subsequent values in favor of the first. assert_attribute(BeautifulSoupHTMLParser.IGNORE, "url1") # And you can pass in a callable that does whatever you want. def accumulate(attrs, key, value): if not isinstance(attrs[key], list): attrs[key] = [attrs[key]] attrs[key].append(value) assert_attribute(accumulate, ["url1", "url2", "url3"]) def test_html5_attributes(self): # The html.parser TreeBuilder can convert any entity named in # the HTML5 spec to a sequence of Unicode characters, and # convert those Unicode characters to a (potentially # different) named entity on the way out. for input_element, output_unicode, output_element in ( ("⇄", '\u21c4', b'⇄'), ('⊧', '\u22a7', b'⊧'), ('𝔑', '\U0001d511', b'𝔑'), ('≧̸', '\u2267\u0338', b'≧̸'), ('¬', '\xac', b'¬'), ('⫬', '\u2aec', b'⫬'), ('"', '"', b'"'), ('∴', '\u2234', b'∴'), ('∴', '\u2234', b'∴'), ('∴', '\u2234', b'∴'), ("fj", 'fj', b'fj'), ("⊔", '\u2294', b'⊔'), ("⊔︀", '\u2294\ufe00', b'⊔︀'), ("'", "'", b"'"), ("|", "|", b"|"), ): markup = '<div>%s</div>' % input_element div = self.soup(markup).div without_element = div.encode() expect = b"<div>%s</div>" % output_unicode.encode("utf8") assert without_element == expect with_element = div.encode(formatter="html") expect = b"<div>%s</div>" % output_element assert with_element == expect