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171 lines
5.7 KiB
171 lines
5.7 KiB
5 years ago
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"""Tests to ensure that the html5lib tree builder generates good trees."""
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import warnings
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try:
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from bs4.builder import HTML5TreeBuilder
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HTML5LIB_PRESENT = True
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except ImportError as e:
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HTML5LIB_PRESENT = False
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from bs4.element import SoupStrainer
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from bs4.testing import (
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HTML5TreeBuilderSmokeTest,
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SoupTest,
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skipIf,
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)
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@skipIf(
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not HTML5LIB_PRESENT,
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"html5lib seems not to be present, not testing its tree builder.")
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class HTML5LibBuilderSmokeTest(SoupTest, HTML5TreeBuilderSmokeTest):
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"""See ``HTML5TreeBuilderSmokeTest``."""
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@property
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def default_builder(self):
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return HTML5TreeBuilder
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def test_soupstrainer(self):
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# The html5lib tree builder does not support SoupStrainers.
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strainer = SoupStrainer("b")
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markup = "<p>A <b>bold</b> statement.</p>"
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with warnings.catch_warnings(record=True) as w:
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soup = self.soup(markup, parse_only=strainer)
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self.assertEqual(
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soup.decode(), self.document_for(markup))
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self.assertTrue(
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"the html5lib tree builder doesn't support parse_only" in
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str(w[0].message))
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def test_correctly_nested_tables(self):
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"""html5lib inserts <tbody> tags where other parsers don't."""
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markup = ('<table id="1">'
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'<tr>'
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"<td>Here's another table:"
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'<table id="2">'
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'<tr><td>foo</td></tr>'
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'</table></td>')
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self.assertSoupEquals(
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markup,
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'<table id="1"><tbody><tr><td>Here\'s another table:'
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'<table id="2"><tbody><tr><td>foo</td></tr></tbody></table>'
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'</td></tr></tbody></table>')
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self.assertSoupEquals(
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"<table><thead><tr><td>Foo</td></tr></thead>"
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"<tbody><tr><td>Bar</td></tr></tbody>"
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"<tfoot><tr><td>Baz</td></tr></tfoot></table>")
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def test_xml_declaration_followed_by_doctype(self):
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markup = '''<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html>
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<html>
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<head>
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</head>
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<body>
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<p>foo</p>
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</body>
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</html>'''
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soup = self.soup(markup)
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# Verify that we can reach the <p> tag; this means the tree is connected.
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self.assertEqual(b"<p>foo</p>", soup.p.encode())
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def test_reparented_markup(self):
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markup = '<p><em>foo</p>\n<p>bar<a></a></em></p>'
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soup = self.soup(markup)
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self.assertEqual("<body><p><em>foo</em></p><em>\n</em><p><em>bar<a></a></em></p></body>", soup.body.decode())
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self.assertEqual(2, len(soup.find_all('p')))
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def test_reparented_markup_ends_with_whitespace(self):
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markup = '<p><em>foo</p>\n<p>bar<a></a></em></p>\n'
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soup = self.soup(markup)
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self.assertEqual("<body><p><em>foo</em></p><em>\n</em><p><em>bar<a></a></em></p>\n</body>", soup.body.decode())
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self.assertEqual(2, len(soup.find_all('p')))
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def test_reparented_markup_containing_identical_whitespace_nodes(self):
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"""Verify that we keep the two whitespace nodes in this
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document distinct when reparenting the adjacent <tbody> tags.
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"""
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markup = '<table> <tbody><tbody><ims></tbody> </table>'
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soup = self.soup(markup)
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space1, space2 = soup.find_all(string=' ')
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tbody1, tbody2 = soup.find_all('tbody')
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assert space1.next_element is tbody1
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assert tbody2.next_element is space2
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def test_reparented_markup_containing_children(self):
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markup = '<div><a>aftermath<p><noscript>target</noscript>aftermath</a></p></div>'
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soup = self.soup(markup)
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noscript = soup.noscript
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self.assertEqual("target", noscript.next_element)
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target = soup.find(string='target')
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# The 'aftermath' string was duplicated; we want the second one.
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final_aftermath = soup.find_all(string='aftermath')[-1]
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# The <noscript> tag was moved beneath a copy of the <a> tag,
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# but the 'target' string within is still connected to the
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# (second) 'aftermath' string.
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self.assertEqual(final_aftermath, target.next_element)
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self.assertEqual(target, final_aftermath.previous_element)
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def test_processing_instruction(self):
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"""Processing instructions become comments."""
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markup = b"""<?PITarget PIContent?>"""
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soup = self.soup(markup)
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assert str(soup).startswith("<!--?PITarget PIContent?-->")
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def test_cloned_multivalue_node(self):
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markup = b"""<a class="my_class"><p></a>"""
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soup = self.soup(markup)
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a1, a2 = soup.find_all('a')
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self.assertEqual(a1, a2)
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assert a1 is not a2
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def test_foster_parenting(self):
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markup = b"""<table><td></tbody>A"""
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soup = self.soup(markup)
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self.assertEqual("<body>A<table><tbody><tr><td></td></tr></tbody></table></body>", soup.body.decode())
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def test_extraction(self):
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"""
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Test that extraction does not destroy the tree.
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https://bugs.launchpad.net/beautifulsoup/+bug/1782928
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"""
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markup = """
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<html><head></head>
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<style>
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</style><script></script><body><p>hello</p></body></html>
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"""
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soup = self.soup(markup)
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[s.extract() for s in soup('script')]
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[s.extract() for s in soup('style')]
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self.assertEqual(len(soup.find_all("p")), 1)
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def test_empty_comment(self):
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"""
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Test that empty comment does not break structure.
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https://bugs.launchpad.net/beautifulsoup/+bug/1806598
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"""
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markup = """
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<html>
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<body>
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<form>
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<!----><input type="text">
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</form>
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</body>
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</html>
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"""
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soup = self.soup(markup)
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inputs = []
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for form in soup.find_all('form'):
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inputs.extend(form.find_all('input'))
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self.assertEqual(len(inputs), 1)
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