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"""Tests to ensure that the html5lib tree builder generates good trees.""" import warnings try: from bs4.builder import HTML5TreeBuilder HTML5LIB_PRESENT = True except ImportError as e: HTML5LIB_PRESENT = False from bs4.element import SoupStrainer from bs4.testing import ( HTML5TreeBuilderSmokeTest, SoupTest, skipIf, ) @skipIf( not HTML5LIB_PRESENT, "html5lib seems not to be present, not testing its tree builder.") class HTML5LibBuilderSmokeTest(SoupTest, HTML5TreeBuilderSmokeTest): """See ``HTML5TreeBuilderSmokeTest``.""" @property def default_builder(self): return HTML5TreeBuilder() def test_soupstrainer(self): # The html5lib tree builder does not support SoupStrainers. strainer = SoupStrainer("b") markup = "<p>A <b>bold</b> statement.</p>" with warnings.catch_warnings(record=True) as w: soup = self.soup(markup, parse_only=strainer) self.assertEqual( soup.decode(), self.document_for(markup)) self.assertTrue( "the html5lib tree builder doesn't support parse_only" in str(w[0].message)) def test_correctly_nested_tables(self): """html5lib inserts <tbody> tags where other parsers don't.""" markup = ('<table id="1">' '<tr>' "<td>Here's another table:" '<table id="2">' '<tr><td>foo</td></tr>' '</table></td>') self.assertSoupEquals( markup, '<table id="1"><tbody><tr><td>Here\'s another table:' '<table id="2"><tbody><tr><td>foo</td></tr></tbody></table>' '</td></tr></tbody></table>') self.assertSoupEquals( "<table><thead><tr><td>Foo</td></tr></thead>" "<tbody><tr><td>Bar</td></tr></tbody>" "<tfoot><tr><td>Baz</td></tr></tfoot></table>") def test_xml_declaration_followed_by_doctype(self): markup = '''<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html> <html> <head> </head> <body> <p>foo</p> </body> </html>''' soup = self.soup(markup) # Verify that we can reach the <p> tag; this means the tree is connected. self.assertEqual(b"<p>foo</p>", soup.p.encode()) def test_reparented_markup(self): markup = '<p><em>foo</p>\n<p>bar<a></a></em></p>' soup = self.soup(markup) self.assertEqual("<body><p><em>foo</em></p><em>\n</em><p><em>bar<a></a></em></p></body>", soup.body.decode()) self.assertEqual(2, len(soup.find_all('p'))) def test_reparented_markup_ends_with_whitespace(self): markup = '<p><em>foo</p>\n<p>bar<a></a></em></p>\n' soup = self.soup(markup) self.assertEqual("<body><p><em>foo</em></p><em>\n</em><p><em>bar<a></a></em></p>\n</body>", soup.body.decode()) self.assertEqual(2, len(soup.find_all('p'))) def test_reparented_markup_containing_identical_whitespace_nodes(self): """Verify that we keep the two whitespace nodes in this document distinct when reparenting the adjacent <tbody> tags. """ markup = '<table> <tbody><tbody><ims></tbody> </table>' soup = self.soup(markup) space1, space2 = soup.find_all(string=' ') tbody1, tbody2 = soup.find_all('tbody') assert space1.next_element is tbody1 assert tbody2.next_element is space2 def test_reparented_markup_containing_children(self): markup = '<div><a>aftermath<p><noscript>target</noscript>aftermath</a></p></div>' soup = self.soup(markup) noscript = soup.noscript self.assertEqual("target", noscript.next_element) target = soup.find(string='target') # The 'aftermath' string was duplicated; we want the second one. final_aftermath = soup.find_all(string='aftermath')[-1] # The <noscript> tag was moved beneath a copy of the <a> tag, # but the 'target' string within is still connected to the # (second) 'aftermath' string. self.assertEqual(final_aftermath, target.next_element) self.assertEqual(target, final_aftermath.previous_element) def test_processing_instruction(self): """Processing instructions become comments.""" markup = b"""<?PITarget PIContent?>""" soup = self.soup(markup) assert str(soup).startswith("<!--?PITarget PIContent?-->") def test_cloned_multivalue_node(self): markup = b"""<a class="my_class"><p></a>""" soup = self.soup(markup) a1, a2 = soup.find_all('a') self.assertEqual(a1, a2) assert a1 is not a2 def test_foster_parenting(self): markup = b"""<table><td></tbody>A""" soup = self.soup(markup) self.assertEqual("<body>A<table><tbody><tr><td></td></tr></tbody></table></body>", soup.body.decode())
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